As you may know the chiral symmetry breaking effect in nuclear matter (for example in a proton) give a strong increase of the mass, which is a gravitational mass (i.e. it is affected by gravitational field). Then the trick would be to find a solution for the opposite effect, that is to say we have to apply a field (what kind ?) on atoms which affects the nucleus up to reach a "negative mass".

From purely theoritical point of view, the gravity is a scalar/tensor field (which affects velocity and acceleration), whereas the chiral symmetry gives scalar/pseudoscalar fields, and electromagnetism gives scalar/vector fields. From this consideration I doubt seriously that someone can master the gravity with *only* an electromagnetic field.

Gravitational effects can be offset by opposingly directed magnetic field effects - like mag-lev trains, etc. Unless there was a EM component of gravitational effects, it's not likely that any direct control mechanism could be implemented.

Even cold bodies in the absence of magnetic fields exhibit gravitational effects in proportion to the gravitational constant, as do bodies with global magnetic fields. This seems to indicate that there is no relation between EM and gravitational effects.

Lenz's law may help! we can control the gravity of an object . Just the concept may deliver some ideas I guess.

I guess we will need to wait for the next Einstein to give us a Grand Unified Theory or a Theory of Everything.

That is unless a great engineer comes along and simply builds a working device before the theory is developed to explain it (as has often happened in the past). In this case I would expect this to be unlikely, assuming the required device to be rather complex in nature.

Of course we can consider electromagnetic fields which of course can transmit energy (photons), which by definition also have mass and hence gravity.

If we could somehow 'invert' an electromagnetic field to harvest energy, perhaps it would give rise to anti-particles of negative mass. Sounds a lot like Sci-Fi.

Of course we have things like the Casimir effect, the Lamb shift and vacuum energy, which show that the universe is a truly strange place.

One can have a propulsion system for rockets based upon the directed emission of photons, electromagnetic waves. One example would be a flashlight inside an orbiting artificial satelite: the astronaut, in free fall with no gravity acting, may hold the flashlight and "drop" it. Then the flashlight would be accelerated through the room propulsed by photons. It could easily acquire a velocity of the order of one centimeter per second, and accelerating. The principle of equivalence establishes that an accelerated system is equivalent to a system at rest but acted by a gravitational field. In general electromagnetic fields carry momentum, and a change in their properties imply a momentum change which is a force. And we can use this force to counterbalance gravity.

In my paper:( A.~Burinskii, The Dirac-Kerr-Newman electron, Grav. Cosmol. 14 (2008) 109, [arXiv:hep-th/0507109 v.4) was considered wonderrful thing that the Dirac equation may be implemented as a master equation in the Kerr-Schild fomalizm for the rotating black hole solutions. Since Dirac equation is controlled by the EM field, there appears the possibility of control also the gravitational objects. The details of the corresponding modification of the Kerr-Schild formalizm are now under consideration and I expect to publish it .

Dear Victor Christianto, I am not knowing whether it is possible or not to control gravitation using an electromagnetic field. But I have come across a paper entitled "Gravity Control by means of Electromagnetic Field through Gas or Plasma at Ultra-Low Pressure".

The paper is accessible via link provided below.

http://arxiv.org/ftp/physics/papers/0701/0701091.pdf

Dear All

Technologies such as magnetic levitation trains do not indicate that we can fully control the gravitation. The forgotten point is the strength of a magnetic field decreases dramatically with increasing distance from the source. By the way, the key question will be how to prevent the rapid fall of magnetic fields at long distances.

I have an instinctive feeling that electromagnetic field or waves is one of the variants of gravity itself. In the universe electromagnetic waves and gravity co-exist. No gravity means no universe and no electromagnetic waves means no life or the physical existence of the world based on evolution. There is nothing like reverse gravity. But there is attraction and repulsion in magnetic fields in a gravitational field. Perhaps examining the reason for magnetic fields, its source and creation may throw some light. Levitation is one offshoot as such. As the world principle arises from gravity concept I think it will be impossible to beat it as long as we live on this Earth.

Dear Vitaly, what I am speaking is not full control, but only possibility to act on the spinning gravitating objects, what is so far unsolved problem.

Dear all contributors, thank you very much for all your answers. Apparently the answers so far boil down to 2 options: yes, it is possible. And no, it is not possible. I hope future research will verify this subject with experiments. All in all, i think this is a very interesting subject to ponder. All best wishes to you.

Dear Theophanes and Dr. Atno Gorgels, thank you for your references, i ll read them soon. To Dr. Ning Wu, yes i read Podkletnov experiments with superconductor sometime ago, but it seems that it lacks theoretical models, although some researchers have tried to explain the results. Best wishes

To Dr. Afaq Ahmad, yes i also found the paper you cited by Fran de Aquino. I think that paper is quite interesting. Best wishes

To Dr. Arno Gorgels, i try to find the paper you mentioned, but don't get it. Would you be so kind to specify which paper title that you meant? Otherwise, please kindly send your paper via direct message. Thank you very much.

Yes. See my ResearchGate Article: Gravitational and Anti-gravitational Applications.

It is also available at http://www.the-origin.org/SciencePapers.htm "Applications".

Dear Dr. Roger Ellman, thank you for your reply. I read quickly your applications paper, and it is quite intere

Sorry, my message is truncated. It is quite interesting, especially about potential application for energy generation. Allow me to ask two more questions:

- have you tested your idea with experiment?

- would you like to post your paper to our new preprint server for renewable energy, at http://www.sciprint.org? It has been restarted about two weeks ago, and it has got more than 650 members, of course not all of them related to renewable energy.

Btw, i got a new book draft, which perhaps you would like to see, at https://www.academia.edu/5130389/A_Journey_into_Quantization_in_Astrophysics_A_collection_of_scientific_papers.

Best wishes to your work.

Thanks, for the interesting topic, I imagine the there might be some relation between the electromegnetic energy (force) and gravitational enegery (force), to study this field in astronomy may be possible.

Electromagnetic Field = Electromagnetic Energy

If you create around a device, an asymetrical Energy distribution you create an Energy gradient, so you create a force (very easy to do, low cost and homemade possibility)

So the answer is YES.

I am working on with success (great thrust for low input power).

The device is similar to asymetric capacitor (apparent reactionless thruster, tested with success by NASA in vaccum)

The device works in AC or DC (thrust is propotionnal to the square of the voltage or the square of the intensity)

Force = gradient(Energy)

Energy = Energy of an asymetric Coil or Capacitor

Asymetry = Asymetry of the shape, Asymetry of the material (core, dielectric)

Theophanes,

Very interesting, but I'm also skeptical (any theoretical associations aside) - if the microwave thruster was interacting with a gravitational field then its thrust should vary with altitude/mass separation distance...

@Theophanes

In vaccum the asymmetric capacitor create a thrust (gradient of energy) without ions (no air), in air we have an additive thrust with ions

http://www.youtube.com/watch?v=G359-G4SZlE

@James

the thrust created by the asymmetric capacitor is not necessary a "anti-gravitationnal" force we are in "similar equibrium" when we write that Charge * E Field = Masse * Acceleration, we have equilibrium but E Field is not an anti-gravitationnal Field

@Theophanes and James

see the third report

http://www.gravitecinc.com/document.html

@Theophanes and James

In conclusions of the Gravitec repport: "it also predicted that the direction of the thrust was independent of the polarity of the applied voltage" so the thrust could not be a ionic thrust

I have a basic question as to how a magnet and magnetic field gets formed, what makes a source and a sink? Can we simulate artificial gravity?. What is the difference between an armature coil spinning inside a magnetic field and the earth spinning in an universal field: and is there any link however small it maybe?

Dear Sundaresan, perhaps this link can help answer your question: http://en.wikipedia.org/wiki/Gravitomagnetism

Perhaps I'm being too restrictive here (the proposals seem to have few restrictions)! I'm assuming that the topic here is more some potential manipulation of gravitational fields rather than some 'gravity-like' EM field... The EM devices being discussed do not, to the very limited extent I can comprehend, involve manipulation of gravitational fields...

@ Victor Christianto ·Thank you very much. It will take considerable time for me to get a practical feel of the same. I hope to understand. Now I can understand more clearly why physicists occupy the highest pedestal.

Dear all, allow me to share a short summary of this discussion in a pdf file (included here). Hopefully it will motivate more ideas on this subject. All best wishes

Referring to http://en.wikipedia.org/wiki/Gravitoelectromagnetism, am I not correct in concluding that what is being described is electromagnetic effects produced by a gravitational field - not an electromagnetic field that produces gravitational effects?

If this is the case, there seems to me to be little justification for the idea that EM fields can be used to affect gravitation, since EM fields are only a biproduct of gravitation - gravitational effects are not produced by EM fields. Certainly I may be misunderstanding - if so can someone better explain?

Dear James, thank you for you comment. I think the correct way to say from gavitomagnetism link that you cited is that there is gravitational analog to maxwell equations for electromagnetism. It only says that there are similar characteristics between gravitation and electromagnetism, so a gravitational magnetism can be derived. But it does not discuss how to control gravitation using electromagnetic field, and vice versa.

Perhaps you can read some papers by Tajmar and de Matos in arxiv, discussing gravitonagnetic field of rotating superconductor, similar to podkletnov experiments. But i think their work is also incomplete. Tajmar and de Matos is from Esa.

Hopefully this small explanations will help. best wishes

Can we say that the gravitational mass and forces was subsequently evolved after the presence of electro magnetic waves and forces?

If gravity is essentially of a (generalized) electromagnetic origin, which can not be excluded, then the answer should be affirmative. As far as I know the theory of this kind is not in the open Experiments. on the other hand, are rather slow in the open research, non-military, institutions.

Interesting read, Theophanes. Maxwell-Dirac theory may be not enough. Going beyond U(1) electrodynamics to a higher gauge symmetry may be needed for obtaining stable solutions. At least that is my intuition. Of course already Maxwell-Dirac is difficult enough!

Dear Arkadiusz and Theophanes, thank you for your remarks. Btw i read sometime ago that dirac equation and maxwell equations are related, see for instance Gersten paper of 1999. Regarding particles, there is also Simulik's paper in aflb suggesting that slightly generalized maxwell equations can describe elementary particles. Do you think perhaps that these approaches can be extended to describe gravitations?

See Simulik paper at http://aflb.ensmp.fr/AFLB-272/aflb272p523.pdf. Thank you and Best wishes

Interesting question. Based on my own research it would be worthwhile to study behaviour of matter with great nuclear spin in horizontal magnetic field.

Dear Christianto, thanks for reminding me about Simulik's paper. I realized that I have a whole bunch of his papers in my collection (some with Krivsky). Will have to look at them again. Yet they seem to be all dealing with 3+1 dimensional space-time, which, I think, is insufficient for describing the possible unification of gravitation with electromagnetism and spin (apart of the weak effects like those found in linear gravimagnetism).

Dear Christianto and Arkadiusz,

I would like to pay your attention to my paper Dirac-Kerr-Newman electron

hep-th/0507109 v4, where Dirac eqs plays the role of a master equation controlling the motion of the Kerr spinning particle.

The problem is that there is no accelerated Kerr solution, and I work on that now.

Dear Alexander,

In order to find such a solution you may need to change (even if only "slightly") the equations that you want to solve. That would be somewhat "unconventional", but nevertheless necessary.

I will not elaborate on this idea, as this is just a hunch, an intuition. And intuitions are sometimes good and sometimes wrong.

Perhaps it may useful to draw the attention of all of you who are interested in the subject to an old paper by A. K. T. Assis "Deriving gravitation from electromagnetism", Can. J. Phys. 70, pp. 330-340 (1992). He derives something that resembles the Newtonian gravitational force from the fourth order effects in a generalized Weber's force law.

Dear Arkadiusz,

Solutions of the Dirac eqs. are controlled by the EM field, and the Dirac eqs. may be implemented in the Einstein-Maxwell eqs. in the Debney-Kerr-Schild (DKS) formalism (as it was shown in my paper). So, there appears the chain

EM --> Dirac --> Kerr solution which allows control dynamics of a localized grabvity by the EM field.

The main unsolved problem is to get nonstationary generalization of DKS formalsm.

It is very complicate, but let us hope.

Nontrivial Maxwell-Dirac are the known Volkov solutions: "Uber eine Klasse yon L6sungen der Diracischen Gleichung" .Von D. M. Wolkow in Leningrad.( 12. Februar 1935.)

Dear Alexander, I will dare to be a little bit more precise: I had in mind something of the kind "The relation between F (R) gravity and Einstein–conformally invariant Maxwell source" ( http://arxiv.org/abs/0907.2520 , Sec. IV. ). Perhaps glancing over this paper will help you in some way. That was my feeling .... but I may be also completely off the the road here. Anyway: good lack with your project!

Thank you, Arkadiusz.

Dear Theophanes,

Volkov's paper was published in German and Russian, but it was discussed for example in the S.Schweber book "An Introduction to Relativistic quantum Field Theory."

Dear Arkadiusz, thank you for your comments. Yes i know that perhaps Simulik,s paper is not sufficient to describing gravity. Assis,s paper appears quite interesting, do you know where can we find a pdf version of his paper? Is it available online? Thank you

Dear Dr. Alexander Burinskii, thank you for your remarks. I will take a look at your Dirac-Kerr-Newman. I think sometime ago i have read one or two of your papers discussing kerr schild solutions published in gravitation and cosmology journal. I read them while i was studying gravitation in moscow some years ago. I find your ideas very intersting with possible implications on hadron physics, and i even wrote a paper touching some of your ideas, with title: some novel ideas in hadron physics(2009), available at http://ptep-online.com.

But i am not sure if your ideas are also applicable to gravitation. Best wishes to your research program.

Dear Kimmo Rouvari, thank you for your remarks. Yes it is possible. Btw, do you know something about Eugene Podkletnov,s experiments? I hear that he is from finland, right? I think his experiments on rotating superconductor back in 1989 deserve further attention...

Dear Arkadiusz, i find Assis,s paper in 1992, but cannot obtain his pdf because it needs authorization. But i can obtain his newer 1995 paper at http://www.ifi.unicamp.br/~assis/gravitation-4th-order-p314-331(1995).pdf. While his idea seems interesting, i am not sure how it explains about how one can control gravitation using electromagnetic field, furthermore there is no hint of experimental result. Can you perhaps explain his ideas further? Thank you

Dear Victor,

I do have Assis' paper, 92 paper, but probably the newer version is enough for you to get the idea. Now, IF gravitation is indeed a fourth order effect of a (perhaps generalized) electromagnetism, then all what we know about gravitation needs to redone, and this should open new door towards the issue of "controlling gravitation).

If there was some experimental confirmation, we would have either Nobel Prize or another case of a research that gets deeply buried on purpose!

So, instead of asking whether there are experimental confirmations, it is better to ask if there are experimental refutations. Not that I know about.

Dear Arkadiusz, thank you for your explanation. Yes i think it is possible that gravitation may be a fourth order effect of electromagnetism. What i meant was experiment like what have been done by Podkletnov etc.

Dear Victor, let us hope that CERN"s AEGIS experiment will be completed one day.

In the meantime we can contemplate astrophysics lessons. To quote from Vilata's paper:

Gravitational interaction of antimatter

"This theoretical prediction of antigravity between matter and antimatter supports cosmological models attempting to explain the observed accelerated expansion of the Universe through such a repulsion between equal amounts of the two components.

The gravitational repulsion would prevent the mutual annihilation of isolated and alternated systems of matter and antimatter. The location of antimatter could be identified with the well-known large-scale (tens of Mpc) voids observed in the distribution of galaxy clusters and superclusters. Indeed, Piran [25] showed that these voids can originate from small negative fluctuations in the primordial density field, which (acting as if they have an effective negative gravitational mass) repel surrounding matter, and grow as the largest structures in the Universe. These new cosmological scenarios could eliminate the uncomfortable presence of an unidentified dark energy, and maybe also of cosmological dark matter, which, according to the Λ-CDM concordance model, would together represent more than the 95% of the Universe content.

If large-scale voids are the location of antimatter, why should we not observe anything

there? There is more than one possible answer, which will be investigated elsewhere."

Dear Arkadiusz, thanks for citing paper by Villata. I find his idea on antimatter interesting, however it lacks detail of the observables as result of his hypothesis.

Btw, I just found an interesting but rather old paper by Tajmar and de Matos (2001), with title: Coupling of Gravitation and Electromagnetism in the Weak Field Approximation, http://arxiv.org/abs/gr-qc/0003011. Tajmar is from Austria, while de Matos is from ESA. In case you are interested, i include here their paper.

Their abstract is as follows:

"Using the weak field approximation, we can express the theory of general relativity in a Maxwell-type structure comparable to electromagnetism. We find that every electromagnetic field is coupled to a gravitoelectric and gravitomagnetic field. Acknowledging the fact that both fields originate from the same source, the particle, we can express the magnetic and electric field through their gravitational respective analogues using the proportionality coefficient k. This coefficient depends on the ratio of mass and charge and the ratio between the electromagnetic and gravitic-gravitomagnetic permittivity and permeability respectively. Although the coefficient is very small, the fact that electromagnetic fields in material media can be used to generate gravitational and gravitomagnetic fields and vice versa is not commonly known. We find that the coupling coefficient can be increased by massive ion currents, electron and nuclear spin-alignment. Advances in material sciences, cryogenic technology and high frequency electromagnetic fields in material media may lead to applications of the derived relationships."

Their more recent papers discussing gravitomagnetic effects of rotating superconductors. Their model is based on Maxwell/Proca equations.

Experimentally, gravity between anti-matter and matter has not been esthablished yet, nor has anti-graity. AEGIS is trying to perform such an experiment, although not with elementary particles, but with compound ones that might react differently then elementary (anti-)particles. I wrote a proposal to repeat an experiment with electrons and positrons, based on the experiment done by Witteborn and Fairbanks. A first draft of this proposal is outlined in : arXiv:1101.2063v1 . I have a cost estimate available for a complete experiment, which would be of the order of 10 MEuro. Extremely moderate costs compared to experiments at large scale facilities...

Dear Victor, I have had some exchanges with de Matos in the past. They are using linear approximation, so the effects they reliably get are small. On the other hand there may exist large non-linear effects. Then the question is: how stable they are?

Concerning possible antigravity/antimatter question (mentioned by Victor-Otto Haan), I really do not understand why Witteborn-Fairbanks experiment has not been repeated till now!

Wouldn't a quantum anti-gravity effect require a negative mass property, since gravitation is imparted in relation to material mass?

Doesn't the existence of exotic atoms, such as positronium, in which an electron and a positron orbit their center of mass, indicate that both have equal mass, thus excluding the possibility that antiparticles have negative mass? Likewise, doesn't muonium, composed of an electron orbiting a more massive antimuon, also demonstrate that antiparticles do not exhibit the property of negative mass?

Even in antihydrogen, composed of a antiproton and a positron, wouldn't it be expected that, if both particles had negative mass, the antiproton would orbit the positron?

Alternatively, since most of the antiproton's mass represent not the aggregated component antiquark rest mass but the confinement of antiquark kinetic propagation energy bound by the strong interaction - would the resulting bound mass-energy be positive or negative?

There seems to be existing evidence that conflicts with any possible antigravity effect being imparted to antimatter...

"There seems to be existing evidence that conflicts with any possible antigravity effect being imparted to antimatter..."

The apparent conflict is evidently not convincing enough. Of course Earth moving around the Sun was in conflict with observational evidence at the times of Copernicus ...

Arkadiusz,

"The apparent conflict is evidently not convincing enough."

So, do you have a different interpretation of the observational evidence provided by exotic atoms that allows for negative antiparticle gravitation?

A layman's thought :-

I am feeling that attraction and repulsion of magnetic influences is in the micro scale; while attraction and repulsion in the universal sense is gravity and anti-gravity.

As gravity is overwhelming it swallows the effect of any magnetic influences.

Maybe because of anti-gravity in a mammoth scale was responsible for planet / star formation and conservation of angular momentum keeps the heavenly bodies in place.

Does every planet have magnetic poles as in earth during planet formation?

What makes the planet Earth to have a north magnetic and south magnetic poles. Extending the logic if fictitiously if one half earth is formed will it repel on one side calling it anti-gravity?

"So, do you have a different interpretation of the observational evidence provided by exotic atoms that allows for negative antiparticle gravitation?" (James Dwyer)

Ask CERN"s AEGIS and ALPHA teams. Perhaps with one simple question you will be able to make them shut down their multimillion project? Perhaps they are not thinking?

But seriously: when you talk about "evidence", you should support it with evidence. That is: provide a solid proof that there is an evidence. It is not enough to claim that there is an evidence. In science, especially in exact sciences, matters should not be decided based on opinions (though too often this happens). Remember: even when all experts agree on a given subject - they all may be wrong.

Dear all, thank you for all your answers. Allow me to upload an updated version of summary of this discussion in pdf file. Hopefully you will find here some hints to move forward. All best wishes to you.

Arkadiusz Jadczyk,

I had forgotten - searching my email, I did receive a courteous response from a CERN ALPHA Collaboration team member back in May of this year regarding this question:

The configuration of the positronium "atom" seems to strongly indicate that electrons and positrons have essentially identical mass, while muonium indicates that the antimuon's mass is much greater than the electron's - since electrons orbit the antimuon very much like they orbit protons in hydrogen atoms.

Please see http://en.wikipedia.org/wiki/Positronium

"Positronium (Ps) is a system consisting of an electron and its anti-particle, a positron, bound together into an "exotic atom". The system is unstable: the two particles annihilate each other to produce two gamma ray photons after an average lifetime of 125 picoseconds or three gamma ray photons after 142 nanoseconds in vacuum, depending on the relative spin states of the positron and electron."

Also see http://en.wikipedia.org/wiki/Muonium

"Muonium is an exotic atom made up of an antimuon and an electron...

Due to the mass difference between the antimuon and the electron, muonium (μ+e−) is more similar to atomic hydrogen (p+e−) than positronium (e+e−). Its Bohr radius and ionization energy are within 0.5% of hydrogen, deuterium, and tritium.[4]"

The existence of these bound configurations of matter and antimatter, along with their characteristics, seem to preclude antimatter having negative mass or its being repelled by gravitation. Have I overlooked or misunderstood something?

To summarize the private communication, there was some extensive discussion about what is inertial mass vs. gravitational mass, but the discussion concluded with some agreement that they are probably the same, but the experiment should proceed in order to scientifically measure the effect of antimatter gravitational mass (I had never suggested that planned experiments not proceed)... While a government auditor might not agree, I can accept this response.

However, I still must point out that expecting that antimatter will produce an antigravitational effect is not supported by existing evidence.

However, I still must point out that expecting that antimatter will produce an antigravitational effect is not supported by existing evidence.

Neither the converse. That is why experimentalists always look for a way to confirm or disprove directly this or other effect. But even then, there can be a discussion whether the confirmation was really a direct one, or it was based on some hidden and questionable assumptions. There is a whole story of "no-go" results in physics that later on were found being based on arbitrary assumptions and not valid.

There is an important question, there is no answer that would convince all experts, thus experiments (more than one, in independent laboratories) are needed.

There you go again - dismissing without cause the evidence I cited!

The ALPHA team member certainly considered that very evidence.

It is certainly theoretically possible to create gravity with EM, since a strong EM field has mass due to the "stress" it embodies. "A magnetar's 10^10 tesla field ... has an energy density of 4.0×10^25 J/m^3, with an E/c^2 mass density >10^4 times that of lead." - Wikipedia So all you need to do to control gravity is be able to switch a 10 GTesla field on and off. :-)

On the other hand, I don't think GR allows for negative gravity. Neither do any of the attempts at EM-GR unified theories, as far as I know. You might have better luck with Heaviside's theory of Gravitomagnetism ("A Gravitational and Electromagnetic Analogy", The Electrician 31 p.281-282 and p.359 (1893)), as updated by Jefimenko ("Causality Electromagnetic Induction and Gravitation", 2nd edition (2000)). I believe that repulsive forces are possible in that theory between rapidly rotating disks, depending on orientation. However, that is a pure gravitational effect, and it is very small, probably not large enough for practical use.

Thank you, Howard, for your answer. Do you know if Jefimenko,s paper is available online? Best wishes

You can also read the review:

http://www.ifi.unicamp.br/~assis/Annales-Fond-Louis-de-Broglie-V32-p117-120(2007).pdf

There are known a few exact solutions of the Einstein -Maxwell theory. What is questionable is the influence of an external EM field on the such charged solutions,

which may be considered as action of the external EM field on the charge distribution in the source of these solutions. So, the problem of the consistent charged sources of the localized gravitating solutions (like Kerr-Newman) appears as a first step for solution of this problem.

Technical Physics Letters 26 (12): 1105-1107 (2000)

An Experimental Investigation of the Physical Effects in a Dynamic Magnetic System

V.V. Roschin & S.M. Godin

http://link.springer.com/article/10.1134%2F1.1337268#page-1

Victor, the relevant Jefimenko books are available from Amazon.com for around US$22 each. I must note that this theory cannot be considered really complete yet, as simplistic calculations appear to give the wrong answer for the precession of Mercury's orbit, and although the theory assumes that gravity propagates at a finite speed (which may or may not be equal to c), it doesn't specify that speed. Also, as far as I know, nothing in the theory predicts gravitational time dilation. (This may not be completely fatal, as it is possible to regard GTD as a quantum effect which could be tacked on when the theory is quantized, but it is somewhat discouraging compared to the natural way that GTD falls out of GR.)

Thank you, Arkadiusz, Laurent, and Howard, for your answers. I read Assis,s review on Jefimenko, and it seems interesting. But Jefimenko,s book seems to discuss a lot more than gravitation control using e.m. Field, which is beyond my question as posed above. Best wishes.

It would also be interesting to control inertial properties of massive bodies using el-mag phenomena. The vector potential A (or better q*A) somehow suggests the analogy with velocity (or momentum m*V). This is however not directly related to your interest in Gravity.

After finding (accepting) the real phace of matter which in different physical stage, are producing Electro-magneto-gravity field will existing the technology to create an artificial gravity field as the Earth creating in time of big Earth quakes bigger than 7 magnitude with hypocentre under 25-30 km-re… Tides of Earth… (http://planeterosion.blogspot.hu/ P.S The condition which permit planet erosion process was explained in a recent work (2009) “Tényekkel Igazolható a Gravítáció Valós Oka” in Hungarian

35% weight variation today, see:

http://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCAQFjAA&url=http%3A%2F%2Fwww.rexresearch.com%2Froschingodin3%2Feipedms.PDF&ei=F1qwU6KgBMqb0wXB-YDoDg&usg=AFQjCNELbcEHopSmDzX5IB6-AwDCplwWEw&sig2=6dDwJzymsjkjCRGTVyVvRg&bvm=bv.69837884,d.bGQ

http://archive.today/KfDuf

http://www.researchgate.net/publication/225690224_An_experimental_investigation_of_the_physical_effects_in_a_dynamic_magnetic_system

Technical Physics Letters 26 (12): 1105-1107 (2000)

"An Experimental Investigation of the Physical Effects in a Dynamic Magnetic System"

V.V. Roschin & S.M. Godin

Article An experimental investigation of the physical effects in a d...

http://www.rexresearch.com/roschin/roschin.htm

@Laurent and Laszlo-Attila, thank you for your references. Best wishes

The results of an experiment with 63000 lumen of light reflected to produce 6 horizontal layers show that 0,17% of the force is cancelled  when the object is placed under the light and it gains weight when placed over the light. The results are published on GRAVITYFORCES.COM

hi Amrit

Your are quoting theories, I am stating facts verified many times in the laboratory. Do you mean facts are wrong and theory is right? Einstein would not do that...

Amrit,

   You might want to read Nick Cook's The Hunt for Zero-Point Energy.

        Robert A. Yaffee

thanks Robert.

Vic

Yes, it was done using horizontal light beam. See the paper on the effect of light on gravitational forces by light.  Rancourt and Phil.  Tatersall. More experiments are being done this summer using blue laser light.

Dear Dr. Louis Rancourt,

This is a important question.

I also did some works about it. Please see:

https://www.researchgate.net/publication/316438315_Gravitational-magnetic-electric_fields_interaction

Experiment Findings Gravitational-magnetic-electric fields interaction vi

Dear Yin

Thanks... interesting

@Yin Zhu

Many people have investigated the relationship between electric, magnetic, and gravitational fields. In the 1950s there was intense and open interest in "antigravity" by the public and by major aerospace firms. But by the mid-1950s publications on this subject "went dark." Later, the field was concealed in plain sight by official ridicule. Lately, it has seemed that the US government has tried to reverse some of this (in a very careful controlled way), but the old attitudes are more deeply entrenched than originally anticipated. Removing the ridicule stigma is proving to be very difficult.

The most promising (practical) investigations in this field involve high voltage pulsed monopolar electric fields, and high voltage rotating electric fields, such as can be produced with two Tesla coils with appropriate physical geometry and electrical phase relationships. Rotating magnetic fields are also used, but require equipment that is more complex.

Some intriguing insights on gravity can be found at:

https://www.researchgate.net/publication/309533409_Beyond_Einstein_non-local_physics 

Some engineering aspects on antigravity can be found at:

https://www.researchgate.net/publication/319002136_Research_needed_on_monopolar_pulsed_high_voltage_levitation 

Article Beyond Einstein: non-local physics

Article Research needed on monopolar pulsed high voltage levitation

Instead of an electromagnetic field simply use an intense laminar light and that does reduce weight of objects placed under or it increase weight for objects over the list.  See experimental results by rancourt and tatters all

Dear Brian,

Thank you very much for your information.