In earlier tests it couldn't be absolutely ruled out that the test result at one point could have been subtly transmitted to the remote point, affecting the outcome at the second location.However so-called "loophole-free" Bell tests have been performed in which the locations were separated such that communications at the speed of light would have taken longer—in one case 10,000 times longer—than the interval between the measurements.
According to some interpretations of quantum mechanics, the effect of one measurement occurs instantly. Other interpretations which don't recognize wavefunction collapse dispute that there is any "effect" at all. However, all interpretations agree that entanglement produces correlation between the measurements and that the mutual information between the entangled particles can be exploited, but that any transmission of information at faster-than-light speeds is impossible.
Without answering what's the physical reality of the Schrodinger wave function, it's not possible to explain the mechanism of spooky action. This effect is independent of non-relativistic or relativistic quantum mechanics.
Nature maintains conservation laws even in the absence of exchange interactions, which results in the spooky action. Further, it's not at all the transmission of any information.
Without answering what's the physical reality of the Schrodinger wave function, it's not possible to explain the mechanism of spooky action. This effect is independent of non-relativistic or relativistic quantum mechanics.
Nature maintains conservation laws even in the absence of exchange interactions, which results in the spooky action. Further, it's not at all the transmission of any information.
To start with, the question has nothing to do with quantum mechanics. Imagine an electromagnetic pulse sent in all directions. The moment of its arrival to a point at a one light year distance will be perfectly correlated with its arrival at all such points (ie, a whole sphere).
The answer to the question is, "Correlation does not imply transfer of information between the correlated points." In my example, transfer of information happens between the source and points on the expanding wavefront. There is no transfer of information between points on the wavefront.
To add, the no-faster-than-light limit only applies to processes transferring information. Standard example: a light spot from a rotating laser on the Moon surface can travel faster than light without violating relativity.
Quantum correlation itself is not able to transmit information.
The distant measurement have to be considered as non-selective measurement, i.e. the measurement with unknown result.
See e.g. M. G. Ivanov, On uniqueness of quantum measurement theory, 2015 (Published online) , 8 pp., arXiv:1508.05760
Mikhail G. Ivanov
Fully agree with you. When hearing all this bullshit - pardon my French - about quantum nonlocality, I always ask a simple question: "How do you know there was no power outage at the distant measurement point? Or it was not destroyed by a meteorite? Or a technician there did not get drunk and screwed up everything he could? Or whatever?"
Thank you Roumen Tsekov , L. I. Plimak, Mikhail G. Ivanov , N. Gurappa , Sydney Ernest Grimm
for all the inputs! Appreciate it.I tend to agree with Ed Gerck. This was the conclusion that was first derived from the E. P. R. experiment that simultaneously measured photons that were separated by a large distance. It was necessary for Bohr to introduce the idea of instantaneous transfer of data between photons within the same probability field to save the concept of remote entanglement and his theory in general. Later, the Bell Theorem experiments seemed to support the Bohr interpretation that photons remained abstract sets of probabilities until actualized. However, it now seems that the malleable nature of photon symmetries and the effects of measuring apparatus were responsible for the results. R. Wiegher demonstrated that the same results can be achieved using photons from independent sources. R. Penrose showed that when multiple entangle particles actualize in different time frames the math of remote entanglement becomes self contradictory. I have posted some tertiary experiments on this site ( "Experimental Determination of Photon Interference Point," "Anomalous Photon Interference", "Polarity and Photon Interference" ) which if confirmed would contradict the Bohr interpretation of the double slit experiment. There are also a few historic experiments that seem to contradict the Bohr interpretation which, unfortunately, were generally disregarded as unexplained anomalies. If the Bohr theory proves to be incorrect then, without any confirming experiments, there is not justification for accepting the concepts of remote entanglement and instantaneous data transmission. Extreme claims require extreme proof.
Thanks Barry Fleagle , Ed Gerck !
My current, possibly biased, opinion is that there is no reason or experimental evidence for the existence of remote entanglement or instantaneous correlation. Groups of photons or particles are obviously entangled at the time of their generation. While some of their original properties continue until they engage with other phenomena they are no longer entangled after the generating event. This view was held by Einstein and other giants. As I mentioned the only experiments that claimed to support remote entanglement involve the Bell Theorem experiments. Others will debate this, but it now seems that the experiments only prove the complex nature of photons, oscillations of secondary symmetries, and the effect of measuring apparatus. Based on my own research with double and single slit interference as well as that by others I have arrived at the conclusion that the Bohr explanation, in which light only exist as an abstract probability field until an interaction actualizes it, is incorrect. If you can find it, you may want to view the late Sidney Coleman's video lecture at Harvard, "Quantum Physics in Your Face". I suspect that Bohr's view of reality as abstract mathematical probabilities may ultimately be close to truth; but I also suspect that photons and other observed phenomena are at the level of complexity where there behavior and properties become deterministic.
My few cents worth. The entire point of Bell's Theorem is to show that in general it is mathematically impossible to reproduce the correlations found in entangled states by means of local encoding at the common source of the particles. Einstein's hope was that it would be possible to explain quantum correlations in terms of what one might call "quantum DNA" (hidden variables), some sort of possibly very complex machinery built into each particle that could be programmed to make the particles behave according to the rules of quantum mechanics, just as heredity can explain similarities between siblings. In 1935 this was a very reasonable suggestion, but in 1964 Bell showed that it conflicts with the actual predictions of quantum mechanics. By now there is abundant experimental confirmation of Bell's result. There is no quantum DNA. Bell himself stated that because of his theorem "maybe there must be something happening faster than light, although it pains me even to say that much." Personally, I do not see why anyone should be "pained" by such a momentous and exciting result. It opens a door to new physics, and we should not be afraid to go through that door.
This recent work stengthens Kent A. Peacock opinion: Preprint Experimental rejection of observer-independence in the quantum world
The entanglements are no more a secret. Consider the polarization singlet (|x>A |x>B + |y>A |y>B). One should not seek the explanation of the correlations by asking why the particle B is found with polarization x when the particle A is found with polarization x. One should notice that that wave-function has amlitude of probability ZERO, for the combination |x>A |y>B. That means, when the particle A responds x, no wave-packet |y> impinges on the detectors of particle B.
There are no faster-than-light signals, the amplitudes of probability is the wave-function handle the wave-packets of the two particles despite the distances.
Entanglement is a feature of quantum mechanics that requires an explanation as to how it operates. Similarly the collapse of the wave function is confusing or perhaps baffling its operation!
Well, I have developed a theory of Time that focusses on the moment "Now", which explains both of these features and more of quantum mechanics!
The concept is simple and yet its implications are profound!
I have attached the first 17 pages of my paper on Time for your consideration.
Thank you for your valuable responses - Arye Friedman , Glenn Dangerfield , Kent A. Peacock , Sofia D. Wechsler
@Lalitha Nallamothula:
Entangled particles are corellated from the beginning of their origin. So there is no action at a distance needed to explain polarization measurement results. The problem is Bell's Theorem. After Bell's assertion measurement results on entangled photons or electrons show correlations that cannot be explained with local realistic models. As Bell has only ruled out non-contextual models a contextual model with hidden variables would refute his theorem. Such a model is presented able to explain the spin measurement results with entangled photons or electrons on
Article On a contextual model refuting Bell's Theorem
Greetings, Lalitha. I noticed in your bio that you are interested in quantum computing. You may want to google "On-demand, photonic entangled Synthesizer". Thamarasee Jeewandara, of the Interdisciplinary Department of Applied Physics and Engineering in Japan, has produced entangled clusters of photons with "quantum memory for entangled continuous variable states". This could lead to a "universal quantum computer by including a programable displacement operator".
As for the current topic, the presence of quantum memory calls into question the Bohr model in which symmetries randomly occur from abstract probabilities, and only after actualization, as well as the accompanying principle of remote entanglement. My own heretical view is that the photon is complex and oscillates between the sigma properties ( hidden variables if you like ). Of course, this violates the Theory of Relativity since photons are supposedly frozen in time and would not be able to undergo such changes. However, neutrinos which undergo change in flavor while traveling at the speed of light have already brought that restriction into question [ it's not every day that I get to question the concepts of Einstein and Bohr together ].
Thank you @Barry Fleagle! That is very interesting! I shall read on "On-demand, photonic entangled Synthesizer".
This is an interesting question that is buried in a number of assertions. First, consider why you think information is immediately transferred? There is a lot of arm waving that the wave function collapses instantaneously, but that is merely an assertion. The next assertion is that the wave is a superposition of the two states and one is chosen at measurement. That is merely an assertion made by the Copenhagen group for some mystical reason best known to themselves because there is absolutely no evidence for it. There is an argument that if a theory cannot be tested, it is not scientific. It is impossible to know what the spin, say, of a particle is until you measure it, but that does not mean there was no spin determined in the first place. If the spin was determined at particle creation, you must still get the same results as you do.
The usual answer to this is that there are violations of Bell's inequalities, therefore the effect must be non-local. Exactly where does what follow "therefore" come from? The mathematical derivation of the inequalities is basic set theory. In my ebook "Guidance Waves" I devote a chapter to this and derive an inequality in three lines. The only assumptions required are that the measurements can be listed algebraically, and the associated law of sets applies. If it did not, then mathematics cannot be used in physics.
When we come to the violations of Bell's inequalities b y the rotating polariser experiments, what I show is that any wave that follows the Malus law (which states the law of conservation of energy) must give the results obtained, yet the law of conservation of energy should give results that follow Bell's inequalities. So what has gone wrong? The answer is NOT experimental loopholes but simple faulty logic. The spin relationships depend on the law of conservation of angular momentum - if that did not apply there could be no correlation. Bell's inequalities require three independent sets of measurements that can have plus or minus results, and the number of plus and minus measurements equals the total measurement, i.e. the probability of one measurement is one. So, what do we have? In the experiment, unless the source is polarised (in which case the results will comply with the inequalities) since the pairs can be polarised in any direction, all measurements will be the same. Accordingly, you have to ensure that at the second detector, only the particles that were entangled with one at the first are actually counted, which with Aspect was done by ensuring it had to arrive withing 19 ns of the first one. But if you do that the first detector has, perforce, a value of one (it means that pair must be counted) and it is not a variable. The next problem is the second pair is obtained by rotating the first configuration through 22.5 degrees. It actually gets the same values as the first one, as required by Nöther's theorem, and from that theorem they cannot be considered as fresh values. They simply do not have enough values to put into the inequalities, and the assertions that the inequalities are violated is more a demonstration of the inability to use proper logic when you have decided what the results must be.
There are two further interesting observations. The first is these sort of experiments re perhaps the most convincing examples of wave particle duality. The second is that by asserting that rotating the equipment gets new values asserts that there is a fixed background that over-rides Nöther's theorem, and also voids relativity. This is one of the points where both relativity and QM cannot both be right. I back relativity in this case.
First and last is the experimental observation. Information seems to be transmitted faster than light. The STOE suggests this is related to the same type observation of the planets seeming to react to the position of other planets and he Sun instantaneously. The speed of gravity (>10^7 c) was measured by van Flandern by noting the Sun's apparent position compared to its (gravity) effective position. This also has the same relation to the quantum eraser experiment.
Any better input than Wikipedia please?
https://en.wikipedia.org/wiki/Quantum_entanglement
The question is a copy-paste of above link...
Dear Demetris Christopoulos,
After reading about Quantum entanglement online, I got curious and wanted to understand more on this topic. Hence the discussion. Purpose of this discussion is to understand the different opinions, ideas, any new advancements, test results, exchange of informative materials on this topic.
Thank you!
I would like to at least “open the door” referred to by Kent Peacock april30.
All the information we can transmit or be aware of is carried by particles, from radio or the hands of a clock to smoke signals! As such it is limited in speed to c, the velocity of light by the special theory.
But, does such a limit apply to other information such as the quantum numbers that define a wave function?
I think not!
If “it takes time for the present to turn into the past”, a small slice of space opens up down which the information can slide ‘’ sideways’’ as far as it likes within this Time Channel! That is effectively instantaneously!
Thus the “Time Channel” theory allows the entangled particles to communicate instantaneously!
(See the attachment earlier)
@ Lalitha Nallamothula
You are not alone in all aspects. Having astonished me is that most scientists have even given up to looking for a simple rightful explanation for Quantum Physics - but not you! It is not me neither!
1) Professor Thompson, Caroline H. (she was a professor of University of Wales, Cardiff, Wales, United Kingdom before) indicated in : Most experiments for Bell-test required certain free-will (e.g. non-fair sampling) subtraction changes resulted that the outcome can be explained realistically into ones that require FTL (Faster-Than-Light) quantum magic. This free-will (e.g. non-fair sampling) agreement is spurious, a result of the experimenters’ decisions, yet faith in theory has left it almost unchallenged
2) There is no mention in published papers of the assumptions behind the adjustment, and insufficient information given for the reader to work out what the unadjusted data was. What the very considerable change it is. That is why Prof. Thompson indicated that ... Once removing the free-well (e.g. non-fair sampling) subtraction changes in Aspect's original test results, anyone can easily formulate the Aspect’s test results by using simply the Einstein’s local-realism theorem together with Malus’ law so as to get the complete description of Bell-test against "Entangled" pairs of photons.
3) Citations, ”The tangled methods of quantum entanglement experiments." Published in “Accountability in Research”6.4 (1999): 311-332.
Mickey Ken , Lalitha Nallamothula - The critical question is, are Bell's Inequalities really violated? My argument is, no they are not, and th results are exactly what you predict from wave particle duality, but a wave is perfectly causal and it complies with the conservation laws, as does the Schrödinger equation. If you argue that Bell's Inequalities are violated, you also argue that the Schrödinger equation, as originally formulated, is not valid. Part of the trouble is when you do an experiment with polarised photons, prior to the initial sorting with a polarising filter the photons do NOT exist as two polarisations; they exist with a uniform background in every orientation, and polarising filters sort these according to wave probability rules. If you look at the details of the experiments you often see an interpretation that focuses on avoiding these details. All polarised waves must follow the Malus law, because that is form the law of conservation of energy, or probability, takes. Therefore, if the results follow the Malus law and they seem to violate the Inequalities, there is a mistake somewhere in the system.
To Ian Miller: there is abundant evidence that Bell's Inequalities are violated; that is not in question by now. (It was in question before about 1980.) Violation of Bell's Inequalities has been confirmed by many experimenters, as reported in many published papers. This result is fully consistent with the Schrödinger Equation, and no conservation laws are violated; in fact, the quantum prediction expresses the conservation of angular momentum. It can be shown that the correlation predicted by quantum mechanics actually follows from a version of Malus's Law; it is this law that leads to the violation of the inequalities. (See "The Price of Locality", in Tim Maudlin, Quantum Non-Locality and Relativity.) What is violated is local realism---the notion that the observed behavior could be explained by "quantum DNA". Another way to express this is that quantum mechanics violates set theory, in the specific sense that the entangled particles cannot have existed in definite combinations of spin states before the experiment was performed. So the polaroids do not sort particles with pre-existent states. Then precisely what do they do to the particles? That is the thing that still is a matter of debate!
If quantum mechanics violates set theory, then you cannot use mathematics with it. If the associative law of sets does to apply, then all addition, multiplication, subtraction and division cannot be used because you have conceded the foundation does not apply.
When you say that there is "abundant evidence that Bell's Inequalities are violated", what is it? As an example, take the rotating polariser experiment, Three determinations are made that have to be independent. One (B+C-) is where the apparatus is exactly the same configuration as (A+B-), except it is rotated by 22.5 degrees. Exactly how does rotating the apparatus create two new variables? That violates Nöther's theorem, and violates the law of conservation of angular momentum
Bell's inequality has been misinterpreted in this thread - see
https://www.youtube.com/watch?v=Vg5z_zeZP60
Tim Maudlin "What Bell did"
John's link is a good one, and should be viewed. My view is that what seems to be demonstrated is the formal state vector operational method of quantum mechanics is flawed, in the same way that Schrödinger's cat demonstrated an obvious flaw (the refusal to accept factorisation). The original Schrödinger equation is as factorable as classical mechanics, and as I show in my ebook, "The Covalent Bond from Guidance Waves", provided you retain the quantisation of action per period, factorisation makes the calculation of chemical bond properties so much easier, and without the need for a batch of validation constants, that are essentially empirical corrections.
The following experimental study Article Imaging Bell-type nonlocal behavior
claims that their "... results can be interpreted as the first experimental demonstration that an imaging protocol can be used to reveal the Bell-type–violating behavior of a quantum system. Reciprocally, our results do show that Bell-type nonlocal behavior can be harnessed to perform special types of imaging that could not be performed with a conventional classical source ".Acceptance of the non-local behaviour of the quantum world - as illustrated by the elegant experiments of type@Ayre Friedman - requires belief that information can flow at faster than the speed of light! Something normally considered impossible.
But the information that is limited to the speed of light is carried by particles - be they mass less photons or mass particles like leptons. In fact all the information which we can control is carried by particles, let's call this Einstein information. So all Einstein information is speed limited ...QED!
But I believe that there is non-Einstein information that is not transmitted by particles. Take for example the information that travels within the wave function of an electron in, say an S2 orbital.
Within this wave function there needs to be some information flow to keep the orbital intact. Otherwise what would prevent the electron deciding to go into a lower, occupied, S1 orbital? There needs to be some control mechanisms that must communicate within the wave function at faster than the speed of light!
Once such an information flow is accepted, say within the wave function of a superposed entangled pair, then the non-local aspects of entanglement make perfect sense!
Why does there need to be an information flow to keep an electron in a stationary state? All you require is a stationary wave. And I cannot see how you can say that once information flow is accepted between the entities in an entangled pair that it makes perfect sense. The whole point of Einstein's EPR objection is that unless relativity is wrong, information cannot flow at faster than light speed. You can't say it makes perfect sense merely by asserting that the problem doesn't exist, surely.
The speed limit applies to signals that human instruments can directly detect such as electromagnetic signals and light. That an ether-like medium exists seems to be required. But this medium is not able to be detected directly. So, the medium directs particles (as in General Relativity's space).
And this medium supports wave action and, therefore, resonances can develop.
The EPR and Bell needs to be better understood because traditional thought gets them wrong. See Tim Maudlin's video:
https://www.youtube.com/watch?v=Vg5z_zeZP60&t=108s
I cannot deny the presence of a medium since my interpretation of quantum mechanics, like that of de Broglie and Bohm, assumes there is a wave that causes the effects noted in the two-slit experiment and if so, something has to oscillate. If you assume something is oscillating, then perforce the polarization of the oscillation cannot be determined by observation because the oscillation is there whether it is observed or not. Again, if so, there is no need to send a signal because if it were set at creation, it always is that, and the entangled nature is part of the creation conservation situation. The probabilistic part is now, you did not know until observation.
My further argument is there is no set of observations that violate the wave nature of the motion, because if there were they would violate the Schrödinger equation, and I have never seen any claim for that. The so-called violations of Bell's inequalities are really only there provided you accept the state vector formalism that sets an absolute background and thus permits the assumption of new "variables" that are in contradiction to the principles of relativity, which is why you later come up with something that appears to violate relativity. In a sense, Bell's argument is very similar to the Schrödinger cat paradox - you get the violations because you assume them in the first place. The issue is in the logic of the analysis. If you assume the principle of relativity, for example, when you rotate the polarizing filters but keep the angle between them constant, you do not get two new variables but merely repeat experiment number 1, in accord with Nöther's theorem. I defy anyone to come up with some observation that violates classical wave theory and the Malus law, because that would violate the law of conservation of energy as well, and would give real differences to the particle nature of motion. Everyone's response is exactly the same as Bohr's to the cat experiment - take the mystical interpretation rather than question the state vector logic.
In modern Quantum Field Theory, it is the oscillation of the various fields that create the particles : such as the oscillations in the electromagnetic field that creates the photon.
My question is : How can a photon be created without there being some information traveling faster than the speed of light to enable the whole photon to be "constructed" ? And perhaps more importantly , how can it remain part of an extensive electromagnetic field that may be 1000 light years across? How can it keep itself a part of the expanding spherical wavefront, with the correct phase etc over such large time and distance scales with some internal mechanism to keep it "in order"?
I believe this mechanism is the ability of the photon to communicate within itself instantaneously throughout its entirety.
Such information is not bound by Einstein's speed limitation as it is not carried by particles which all the information we can transmit is limited to!
Time Channel Theory, as described in my attachment to my first comment, describes such a process where the non-Einstein information can travel through out the wave function instantaneously. With this ability to communicate within itself instantaneously, a photon , or an electron, can readily travel through both slits of a classic or delayed choice two slit experiment and then instantaneously manifest itself where it is allowed to by the wave nature of its wave function. Thus appearing as though it were a particle rather than a wave!
Similarly, if two entangled particles are in fact one combined wave function with one undefined quantum number, than the instantaneous information flow within the wave function can readily explain how the resulting 2nd measured particle has the appropriate response to a measurement made on the 1st!
Something that causes an effect elsewhere instantaneously is considered non-local. My question to anyone is how can non-locality be reconciled with the requirement for Lorentz invariance?
Lorentz invariance is not an issue because: We are considering the situation where the time within the one wave function is being set at the same time throughout the wave function. And just as the time in a local inertial frame is set in relation to the direction of travel, there is no reason that this time could or should be set any differently within a wave function. Similarly the length contraction will also apply to the wave function, as will the time dilation.
In other words, the wave function gets itself sorted relativistically be reference to the space through which it is travelling and will thus exhibit the required time dilation etc required, as when a muon "lives longer" than it should when it is travelling at high speed through the upper atmosphere from a cosmic collision!
How can a wave function show the time dilation effects of Einstein's relativity without being Lorentz invariant? I can't see how that can happen when the time dilation effect and the length contract rely on Lorentz transforms
Sorry, bad choice of words!
The non-locality is not relevant as the wave function is Lorentz invariant as illustrated!
If the wave function is non-local, as it must be if entangled particles can be any distance away, (a), how can it be irrelevant, and (b) how can it be Lorentz invariant. You can't show it just by assertion.
Information must be able to be transmitted by something other than particles. What exists must be able to exist. Just because popular models don't explain entanglement, doesn't mean an observation cannot happen.
Took time to do some reading. Trying to interpret the meaning of the above replies:
Dear John Hodge , Am I interpreting your above reply correctly? 1. There must an undetected medium which is imposing the speed limit? 2. We do not yet have the ability/technology to make the observation/measurement to confirm the medium's existence?
Dear Glenn Dangerfield , "I believe this mechanism is the ability of the photon to communicate within itself instantaneously throughout its entirety. " Does this statement imply that the photon is self aware at all times?
Dear Ian Miller , Do you mean to say that it is the people performing the experiment with limitation of conscious assumptions (not considering all the variables) that lead to Bell's inequality but there could be other variables that they could be missing? I mean, do you imply that it is from our frame of reference, the Bell's inequality exists, but there could be other frames of reference?
Thanks in advance!
Dear Lalitha Nallamothula
No. I am saying that these experiments are not interpreted properly, and there tends to be logic mistakes in the workup. As an example, take the rotating polariser experiment, and assume the form A+B- + B+C- ≥ A+C- (That is the simplest form of a Bell Inequality and you can derive it from set theory in about three lines. The only way it could be violated is if the associated law of sets fails. You might also note it says nothing about non-locality. However, if you read Bell's original article on washing socks, you see that for any variable, the sum of the plus and minus scores must equal 1 (that is you measure each item just once) and that A, B and C must involve distinctly different situations.
Now, if you look at the average rotating polariser experiment, you will see that B+C- is exactly the same as A+B-, but with the whole equipment rotated through 22.5 degrees. As long as the source has random polarisation, they are not two new variables or a new determination. The concept violates relativity (because if the source is random, the second determination is in the frame of reference of the first because it is only counted if it arrives within a given time frame of the first) and it violates Nöther's theorem, or the conservation of angular momentum. So what I am saying is the experiment is not valid beaus there are not enough true variables measured to put into a Bell inequality. The problem here may be because quantum mechanics, and the background maths tends to be derived from state vectors, actually assumes a fixed background, and I think that is wrong. That assumption is what makes quantum mechanics incompatible with relativity, but in this case the experiments are usually conducted to show the source is random.
Yes, in the sense that the photon has the same quantum numbers available to it at all locations within itself at all times. And, when they change this change is communicated every where within the wave function of the photon instantaneously.
This set of quantum numbers is what defines the photon, and what influence the interactions it can undertake.
I would not use the words 'being self aware" as this implies a consciousness to the inanimate photon!
Lalitha Nallamothula
your 1. not necessarily "must be". The observation by actual experiments is that particles have an upper limit of c in any medium such as glass, water, vacuum. (This is more like Lorentz ether theory (LET) than special relativity.)
Your 2. Our measuring instruments detect particle effects. Therefore, any medium like an ether or the STOE plenum can be detected only through its effect on particles. We do have the instruments and have done the experiments to provide data to measure the speed of particles in the vacuum as well as in glass and water. T. van Flandern has measured the speed of gravity at over 10^7 times the speed of light. I ignore "thought experiments" because they reflect the model used to define them. If a measurement/experiment is done, the result must have an explanation. If a model of the experiment suggests another result, the model is wrong. Today, observations reject the models in cosmology and in models of the small (Quantum mechanics). Cosmology observations reject Quantum models and quantum observations reject Cosmology models. But the issue is more of comparison between models. It's a case of better not one of being complete
The entangled experiments done at different locations are a single entity. They are not spatially separated as in classical physics. There is no need for signalling of any kind. No need for any kind of interaction between entangled things. Real particles moving in space time have an upper speed limit given by special theory of relativity. But quantum mechanics does not describe things moving in space time. That is classical physics.
Thomas, the first term in the equation that Schrödinger published was a Laplacian operator, and for that matter, that equation can be derived from the Hamilton-Jacobi formalism provided you assume the phase is determined by quantised action (which is the real difference between classical and quantum mechanics). The Laplacian considers changes of position with respect to time, so the spatial conditions of classical physics remain. It is true that the state vector formalism seems to have introduced non-spatial non-separation, but that is a completely fresh assumption and comes from nowhere other than assertion. (I am ready to be persuaded otherwise on that as long as someone can give a physical explanation, nd not a circular argument with long-winded operator mathematics.) Note that Einstein in the EPR paper argued that a signal was required, and if nothing else, Einstein understood relativity, and he was good enough to follow other physical arguments. He may have been wrong, but to show he was wrong you have to show the physical argument, and not merely assert it is so.
As Lalitha Nallamothula stated in her question, there is no signaling between entangled particles. Physics is an empirical science and to show that Einstein was wrong, we must do the experiments. No superluminal transmission is demonstrated in real experiments done by Aspect and other later experimentalists. Please look at those experiments. Unfortunately, there is no classical explanation for the results of those experiments. We invented quantum mechanics because classical physics does not work on the atomic level. For example, does the Laplacian, or any classical theory, predict the stability of atoms? How does the position of an atomic electron change with respect to time?
Then look at the experiments. There are none that would not give the same results if the spins, etc, were determined at creation. It is a pure assumption by Copenhagen that they are determined by observation. As I explained, or tried to, Aspect et al have merely demonstrated at a truly marvellous level wave particle duality. They have NOT demonstrated violations of Bell's inequalities, because they have not determined sufficient truly independent measurements. Not only hat, but if they had discovered violations, there is nothing in the inequality to indicate that non-locality follows; merely that mathematics were not followed. That of course, means something was wrong, but it does not say what.
Article Cumulative quantum mechanics (CQM). Part I: Prerequisites an...
It is very sad to watch how the common bull..it about "quantum nonlocality" again and again makes people confused. Four basic points are to be well understood and learnt by heart:
1. Unlike cause-effect phenomena, correlations do not imply transfer of information and, ipso facto, are not subject to causality laws. Instantaneous correlations across space-like intervals are allowed in classical as well as in quantum mechanics.
2. Bell's argument uses nonlocality as reductio ad absurdum: "There exist phenomena in quantum mechanics which, in order to be explained within classical mechanics and classical probability laws, would invariably require nonlocal interaction." There is not a word in this statement about "quantum nonlocality".
3. Observation should not be confused with inference. Causality laws apply only to observation. So, in the EPR arrangement, by registering a particle with spin up, I may infer that the second observer has simultaneously observed a particle with spin down. However, in no way have I observed the second particle.
4. Unlike correlations themselves, ways correlations develop are subject to causality laws. When discussing an experiment, one also has to include cause-effect chains in the way an observer learned about the experimental arrangement as a whole. Laws of quantum mechanics which one uses to describe the experiment are also part of the cause-effect chains, because they implicitly contain information based on previous experiments. Taking all these cause-effect chains into account eliminates all paradoxes. Vice versa, disregarding some of them may produce scores of paradoxes.
Hope this helps
L. I. Plimak
Good point. the "sock" example is that if you suddenly observe the color of a man's sock on the right foot, You are very confident of the color of the sock on the left foot.
So, a valid experiment should include the reason/support for the causality. Simple correlation is insufficient.
Example: you hear a sound (say a band playing) coming from a container but have no indication of a band. Other than an hallucination, what could its cause be. If at the same time you see a band playing on TV that seems coordinated with sound that is playing several thousand miles away, then somehow the sound of the band traveled many times the speed of sound. Is this different than the problem?
No. In this example we expect we have characterized the different medium of the link. Well, we just need a different medium (ether, plenum, etc.) to carry the information. SR should be stated like Lorentz suggest in LET - the speed of light is the fastest MATTER can travel in any medium.
A minor comment on socks. In Bell's paper, he mentioned Bertlmann liked to wear different coloured socks. Accordingly, you cannot be confident unless you know for sure that the relationship you expect actually applies. In the case of spins, a conservation law generates the correlation, and further, if you found it did not apply you would conclude they were not entangled. Think bout that before you invoke "faster than light signals".
I'm responding to the previous four comments. The entire point of Bell's Theorem was to provide a quantitative test of the hypothesis that quantum correlations are due to local, common causes, as classical correlations between shell fragments or M. Bertlmann's socks would be. Bell showed quite rigorously that the correlations typically observed between particles belonging to entangled states cannot be underpinned by a Boolean (classical) model. Cannot! Since Bell published his basic argument in 1964, many, many experimenters have verified his results. At first there were a few theoretical loopholes in the argument, but most or all of them have been closed off by now. As Bell himself put it, the result refutes what he called the "genetic" explanation of quantum correlations. Shared genetic heritage can explain correlations between siblings, but there is no quantum DNA! See Bell's book Speakable and Unspeakable in Quantum Mechanics, which contains his basic papers and a good paper on the differences between Bertlmann's socks and quantum particles. Perhaps if Bell had received the Nobel (No-Bell) Prize that he richly deserved, there would be less continuing confusion about what was actually established.
Now, does Bell's Theorem mean that there is something going faster than light in a correlated state experiment? Bell himself thought so, though he was very uncomfortable with this conclusion (because he was, himself, a very conservative thinker). Bell's Theorem in itself is mainly a negative result: it shows that local-common-cause explanations are impossible, but it does not tell us what is in fact going on. My own view is that there is ample evidence for nonlocal dynamics in entangled quantum states, but I would concede that this view as still open to debate. But what is not open to debate, or not much by now, is the basic result that quantum correlations in entangled systems cannot be explained by local common causes.
I agree with@Kent that "quantum correlations in entangled systems cannot be explained by local common causes!" My view, as explained previously, is that there is a distinction between the type of information that cannot travel faster than light - because it is transmitted by physical particles - and what I have called internal quantum information - which involves the information that the quantum particle needs to exist as a separate entity!
As this "information" involves the structure of the entire entity, it must travel at faster than light speeds and can therefore account for the correlations involved in the non-local aspects of quantum entanglement which involves the one combined entity being then split into two components! That is when, the original, say spin zero combined state, is split into a spin up and a corresponding spin down component!
My attitude remains unchanged. If you wish to argue that Bell's inequalities are violated, demonstrate a method in which the three totally independent conditions are represented by +/- measurements that total a probability of 1 each. Demonstrate how you can have violations of the system that follows the conservation laws, because the conservation laws must follow the inequality. If you like, conservation of socks. By taking the - value of how many of the + partners are registered, you automatically cancel half the variables, in then same way if, in Galileo's example, you measure the speed of the boat compared with a lighthouse, you have only ONE variable, because the second one is in the reference frame defined by the first. The lighthouse is not stationary; it merely is in that frame of reference.
So stop praising Bell and demonstrate where the required number of variables are measured.
If an observation/experiment is inconsistent with theory, the theory is wrong - not the other way.
Perhaps we're confusing transfer of information with maximum speed of particles. Information may be by a wave in another (non-matter) medium as aether proponents have argued. Thus, Special Relativity is suggesting a limit on the speed of particles and faster speeds are indicating a medium.
Definitely you should look into the Transactional Interpretation by John G. Cramer: https://www.youtube.com/watch?v=FcmA3xq0Dk4
Ruth Kastner also looks into this with great detail. This is much spookier than we originally thought but makes a lot more sense.
The theory proposes that all there exists are "offer waves" not physical photons. The "offer waves" can only form one transaction. For that to happen an absorber must exist. The theory is philosophical i.e. it doesn't affect the quantum mechanics equations but provide insight and light of the intrinsic mechanism of reality.
Feynman proposed that field waves has to travel to the future and to the past to form a single transaction. Therefore the "spooky action" can be explained by time travelling of invisible offer waves that only exist in the probabilistic region (quantum mechanics theory) but which in the present and in reality culminates as conservation of energy-momentum, and a real energy exchanges products (e.g. a photon colliding to a screen).
Don't forget if the properties are set at creation of the entanglement, no information transfer is required. The ONLY reason this is a problem is this assertion that the spins of the particles are in superposition, i.e. some sort of Schrödinger cat state prior to measurement, and measurement collapses the state. There is no mathematical process for this and it is merely an assertion that has taken hold. The issue is then put to one side and classified as "The Measurement Problem", as if that solves it. There is also absolutely NO evidence for this, nor can there be because you cannot know what is the value when it could be equally one of two values until you observe it. So what has happened is we have this mystical interpretation with no evidence for it whatsoever. After all, who needs Ockham's razor when you can assert and all believe?
Pablo Zacheo
Thanks for the video reference. It's very instructive.
Note his explanation is a particle (emitter, not a wave of light but a photon) emits a wave (in a medium?) which reflects and the reflected wave then influences the particle. NOT a wave from the future. So, he seems to be implying the wave travels much faster than a photon.
The STOE agrees with this model as it explains many experiments that reject wave models of light.
One of the other commentators in RG (Farhad Vedad I think) also noted that the laser light in a diffraction experiment starts to deviate path just before the slit. Thus, the faster than light speed of the waves in the medium (called a plenum to be slightly different than an aether) seems to be not rejected. This is also the medium that causes the experience of gravity and van Flandern measurement of faster than speed of gravity effects.
I especially like his treatment of the Bohm Interpretation. I accepted Bohm to the extent that the photon (a particle) did the radiating. But his suggestion that a particle should obey Heisenberg uncertainty is contrary to Bohm.
John Hodge I really don't know whether the waves on the Transactional Interpretation exists, other than an imaginary radiation that travels back and forth to the future and to the past, making sure that energy is conserved. As you can see any radiation that can do this cannot be detected. It travels faster than light, yes, because it travels back in time. It also travels to the future and goes back. How can this be possible? Well this is the center of all mistery.
And it doesn't propose any change to QED in any way, the probability fields are there, just the interpretation changes. Now the observer plays no role, only the absorbers. And any absorber could "close the deal".
Not sure if you studied the Birgit Dopfer experiment. In her experiment she proposes that the photons "know" what is going on the other arm of the experiment. She concludes that the LiLO3 crystal can be considered as a mirror. And the experiment makes only sense if you run it on reverse.
How can a LiLO3 crystal can be considered a mirror? Well that can be explained by the Transactional Interpretation. We imagine photons travelling forward from the pump to the detectors. What if the case is reversed? This will make sense as only "matching photons" can be detected. These entangled photons (in time reversed) are combined in the pump to form the original laser light. If the photons are different they cannot be combined and the transaction cannot be formed.
This needs a lot more of research. The current Copenhagen interpretation makes no sense. We need to embrace a new kind of interpretation to make more progress.
Violation of the speed of light is not required if the offer and confirmation waves can travel back and forth in time freely, and they seem to travel several times to form each transaction.
Pablo Zacheo
Travel back in time is even more mystical than the STOE. See
https://www.youtube.com/watch?v=OMAjKk6k6-k
and https://www.youtube.com/watch?v=qFDB-K_sSjU&t=58s
TheSTOE model meets ALL the experiments your video showed plus these additional videos that reject wave models.
BTW I think you may have the entangle experiment s slightly incorrect. Entanglement experiment is after emission in both directions one is spin up the other down. Then (in flight) one of the particles is changed, the observation is that the other changes also although it is far away.
I will look at the videos with an open mind, Einstein didn't like entanglement but he had to admit it was real. Can Einstein be debunked by an amateur experiment, decades of experimentation have proved quantum entanglement exists and is real. And there is no plausible traditional explanation for it. In fact QED never attempts the explain the phenomena, just to predict it and model it.
"an unpublished doctoral thesis by the Austrian Birgit Dopfer indicated that instant communication over a distance may be possible. In an experiment, Dopfer generated entangled photons. One set passed through a double slit to create the familiar interference pattern. The other set was measured to determine which slit the first set passed through. Whether one set was measured or not appeared to affect whether the other set exhibited an interference pattern or not, mimicking, over distance, the well-known phenomenon of photon wave/particle duality first observed by Thomas Young in the 19th century. If Dopfer’s experiment can be confirmed, it demonstrates a new form of entanglement that goes beyond mere correlation and implies that instant, non-local energy-less communication is possible."
https://www.indiegogo.com/projects/time-travel-experiment#/
http://www.paulfriedlander.com/text/timetravel/experiment.htm
I know this sounds like science fiction, but reality tends to be more fantastic than fiction!
The description here is not quite complete, but it appears to me to have the same issues as the delayed choice quantum eraser experiment. I suspect there is an interesting answer but without full details it is difficult to be sure.
John Hodge your theory of waves can be in agreement with Kramer's Transactional Interpretation. He proposed waves travelling back and forth, not photons, the photon is the final transaction, the result.
The photon is the energy transfer which closes the loop. Even when analyzing the movement of electrons, electrons exchange a photon first.
Photon exchange is the mother of everything at the quantum level.
I heard of a theory of gravity based on a field that is present everywhere but has a hard time to get through solid objects. As the "gravity field" cannot move through them or it's attenuated by matter, it creates a "pull". This can be demostrated it theoretically based on fluid equotations. I think I also heard a theory of grativy based on "light" interactions - based on the apparent size of the moon and the sun, which you can say could be a coincidence, but is it?
What do we know?
Short answer for photons here: https://sciencex.com/news/2020-11-wave-particle-duality-entanglement-customary-pitfalls.html
Full answer here: Conference Paper The Mach-Zehnder interferometer and photon dualism
A very interesting article/approach explaining wave particle duality. Thank you for sharing @Paul Klevgard ! Would be interesting to expand this thought process to Quantum eraser experiment.
Pablo Zacheo
The de Sangro, et al. experiment "Measuring propagation speed of coulomb fields https://arxiv.org/abs/1211.2913 also measures a much faster than light speed. So, the STOE plenum medium explains all these experiments.
The short answer is that joint measurements of entangled systems demontrate correlation of the measurements, even in "spooky" ways, but that does not entail necessarily transmission of information from one into the other (correlation is not the same as causation).
Jose Moreno
Before her passing away, Caroline T. had ever authored a few decent articles as how to illustrating experimental proofs of EPR pairs not violating the Bell States, with which can be well predicted by Malus Law in accordance Einstein's EPR theory.
For those persons who would be interesting to expand her great finding and thought process for Quantum Entanglement experiments, please enjoy to read her article.
Entanglement is a notion artificially created by Quantum Mechanics. The correlation is a trivial consequence of determinism and a disproof of the uncertainty principle. See:
Preprint The Quantum Captivity of Physics
From a formal point of view the situation is simple. Entangled particles have a wave function which is not separable into contributions from the individual particles. One has to distinguish between the dynamics of a wave function (response to forces, which his clearly confined by the speed of light) and its mere time dependence (exp(-i*omega*t)), which is just a function of the energy omega. For example, oscillation of p-type wave exchanging the "+"-lobe and the "-"-lobe is not bound to the speed of light. By definition of Hilbert space, wave functions reach out from plus to minus infinity maintaining there time dependence even if one looks at a distance of 60 Km or more.
You cannot make a conclusion about a physical observation solely based on your mathematical formalism. For example, Hilbert space is not a "thing" - it is a mathematical way of making the theory you have and its mathematical formalism work. If it is designed to make the formalism work, you cannot use the fact it works to justify the formalism - the argument becomes painfully circular, but well-hidden from view.
Dear All, Recently I have proposed a new mechanism to explain quantum entanglement derived from my earlier works concerning black hole information paradox. Kindly review and let me know your comments. Thanks!
Deleted research item The research item mentioned here has been deleted
Vaitheeswaran Ranganathan
Namaste Vaitheeswaran.
The experiments related to "quantum entanglement" were suggested in a paper by Albert Einstein where he analyzed and criticized QM.
His reasoning was that the principle of indeterminacy (POI) contradicted the following pair of already accepted and well established physical facts:
F1.- The law of conservation of angular momentum.
F2.- The speed of transmission of information cannot be higher than c=speed of light.
If a pair of particles was produced that were flying apart and conservation laws required that their angular momentums added up to zero, the POI could not be true. Because the particles when far apart could not tell to each other the result of the their angular momentum measurements. Thus the POI implied a "spooky" phenomenon, in consequence the POI is false and QM is left without one of its "paradigms".
The arguments of Einstein did not require any experiment. It was pure logic, like Galileo proof that bodies fall at equal speeds no matter what the weight. Just tie up bodies of different weights and think about what should happen.
Nevertheless to dispel doubts experiments were eventually carried out confirming that Einstein was right. The correlation of the measured angular momentums exists hence the POI is futile.
But the quantum establishment misappropriated the results insisting that the POI was true and that transmission at speeds much higher than c did happen, proving that the particles were somehow "entangled".
But they are mistaken. Quantum entanglement is complicated and unnecessary. It suffices with classical conservation of angular momentum all along the path of the particles to clearly explain the correlation. As a psychological exercise suspend any belief in the POI. And then check which of the remaining quantum axioms survive.
If expressed in the language of Vedanta one can most respectfully say that "Karma permanently and everywhere exists in the physical universe".
With most cordial regards
Namaste Vaitheeswaran
Daniel Crespin
What tends to be overlooked here is that while the conservation of angular momentum applies, it is that application that is why we say the photons are entangled. If the correlation was not observed we would simply say the photons were not entangled.
The problem arises simply because we insist that the wave function is a superposition and the probabilities are physical, as opposed to showing a lack of knowledge. If you insist that the actual polarization is determined at observation, then observation proves the other photon's polarization was also determined instantaneously. There is no way around this. On the other hand, as I have shown in a chapter of my ebook "Guidance Waves", there have been no demonstrations of violations of Bell's Inequalities, because experiments such as that of Aspect have a hidden assumption that leads to the creation of independent variables that are not independent or varying. (They violated the law of conservation of energy by not properly counting photons, and the assumption violated the law of conservation of angular momentum upon which the logic depends. Thus simply rotating the equipment by 22.5 degrees is assumed to create two new variables, in violation of Noether's theorem.)
If you abandon the assumption that the polarization is determined at observation, rather than at creation, then the problem immediately goes away. If you assume the Malus law, which is observed for "bulk photons", then the experiment truly follows a wave equation, and is the best determination of wave-particle duality, BUT conveys no mysticism.
I still tend to reason that the speed of light must had been measured within some medium that generated the value we know. However, at certain media, like in vacuum, it can be proven that neutrinos can quantumly entangle and correlate instantly at higher speeds greater than that of light.
https://www.youtube.com/watch?v=5D9HkoHScdY&feature=youtu.be
The Institute of Art and Ideas (6.37M readers) Exemplified .. The Problem With Quantum | Roger Penrose, Gerard 't Hooft, Chiara Marletto, Phillip Ball, etc.
What challenges does quantum theory face in the 21st century? From Nobel prize winner Gerard 't Hooft to renowned physicist Roger Penrose, the world's leading thinkers explain the problem with quantum. God blessed Einstein since he believed Quantum theory is not the complete one or hidden variable is in.