What is this "rainbow gravity" about?

[michel123456]

I found very few information about it.
the most meaningful being this excerpt below, from this site http://www.quora.com/What-is-the-rainbow-gravity-theory-in-laymans-terms
(which is not the best information source)

James Hollomon, No advanced degrees, but I do have a .(...)


Thanks for the A2A, I'll give it my best shot. One thing's for certain. I'm a Web developer and not a theoretical astrophysicist, so I can only explain my understanding of rainbow gravity in layman's terms.

In scientific terms, the idea of rainbow gravity is not a theory, it is at best a postulate. But it's a testable postulate. Our current understanding is that gravity affects all electromagnetic radiation equally, bending it a given amount determined only by the gravitational force applied to the wave. Rainbow gravity says that's wrong. It predicts that powerful gravitational fields around supermassive objects will bend light (and other electromagnetic radiation) differently depending on its color (which is analogous to its electromagnetic wavelength) or more properly, its energy level. The rainbow term comes from the fact that if you look at a black hole up close and personal, and if the rainbow postulate proves true, you would observe not white light but a rainbow falling into the black hole. (...)
What's most interesting about the postulate is that if true, it will help resolve the incompatibilities between Relativity and Quantum Mechanics. Also, if rainbow gravity is correct, then the Universe did not begin with the Big Bang, it is far older. In fact, it may be infinitely old. So the neat thing is if rainbow gravity is right, it answers the conundrum about who or what could have caused the Big Bang. The bummer is it replaces it with the equally baffling mystery of how the Universe can be infinitely old. Oh well, there is no possible answer to first cause that makes sense to our human intuition.

But don't throw out your astrophysics text books just yet. The idea of rainbow gravity has been around for 10 years and it is not yet accepted by the bulk of the scientific community.

Till today I had never heard of "rainbow Gravity". There are few youtube videos (not reliable by definition) and no mention found in Wikipedia although being around for about a decade.
What about it? And why is it not accepted?

Thanks

[Strange]

I have never heard of "rainbow gravity". I am fairly sure there is no evidence for the wavelength-dependent dispersion that it predicts (but I can't find any references for this right now).

[Mordred]

I'll have to study this but here Is one paper

http://arxiv.org/abs/1307.0745

[ajb]

You can also get dispersion effects when looking at QED on curved backgrounds. You could start with the paper by Hollowood and Shore (http://arxiv.org/abs/0707.2303). Shore I know has written several papers on this subject.