This is just a hypothetical question.
In the relativistic setting it is assumed that if an event or a point lies outside the light cone (with the observer at the apex), it cannot be influenced by the observer. Moreover relative notion of time cannot be established between the observer and this point outside the light cone.
My question can be further divided in to sub parts.
1> Is it possible for a particle to become entangled with a particle outside its light cone.
2> If such is possible then is it correct to state that quantum physics does not go well with relativistic physics
3> And an other side question, if we were to somehow cover a region of interest in the universe, inside or outside the cone, with particles that were entangled with a sister particle in an observatory. Is it theoretically possible that we have a real time digital image of that region of the universe.
I know very little of both relativity and quantum physics so apologies for any obvious dumbness!
No, because the light cone isn't a meaningful concept in non-relativistic quantum mechanics.
So the answer to both questions is that they don't make sense. Within non-relativistic quantum mechanics there isn't any notion of a light cone and entanglement simply means that probability distributions don't factorize; but it doesn't make sense to use relativistic probes, such as electromagnetic waves. Within relativistic quantum field theory, there aren't any conceptual issues that would be obstacles to treating entanglement in a way consistent with relativity.
There are observations done on pairs of entangled photons, where the two detection events lie far outside each other light cone (information travelling from one event to the other would have to travel with a speed exceeding 107c, although both events lie on the light-cone originating from their common creation). But, according to the no-communication theorem, https://en.wikipedia.org/wiki/No-communication_theorem, this cannot be used to transmit information faster than the speed of light. An effect like quantum teleportation also requires classical communication to work, hence are restricted by the speed of light.
Relativity and quantum mechanics is a rather good marriage.
Dear friend !
You are asking wrong question , Because it is not legitimate question !. But philosophically legitimate question !
- because both things are working efferent definitions of frame works : Newtonian mechanics and special theory of relativity (STR)
(2) If u defying foundation of QM according to relativistic definitions ,you cant have partial like 'Dakione' . But u can have 'Takiona ' particles !
In fact the no-communication theorem doesn't have anything to do with special relativity-which is to be expected. The reason is that it refers to properties of phase space, not spacetime, of a non-relativistic system and simply is a statement that it isn't possible to relate two states in a specific way-in phase space. So the statement that they're photons doesn't imply that relativistic effects have anything to do with the setup, which is the description of any, non-relativistic, two-level system. The phase space of a non-relativistic, two-level system, is not that of a relativistic system, that is completely different, due to the constraints, so the observables are different.
It's, unfortunately, a common mistake to confuse phase space issues and spacetime issues, when discussing non-relativistic quantum mechanics.
And philosophical issues are irrelevant.
- Badges
- Science topic
- Similar topics
- Correction