Recent content by vacuumcell

I haven`t read the paper, but my understanding is that any physical system with entropy must also have temperature and vice versa.

Admittedly, I don't know that much about LQG and so won't speculate on whether you get the real drift. I do however know that the idea of quantum spacetime as a "seething foam" didn't originate with LQG. One thing I've noticed in this forum is that many ideas brought up in the context of LQG are...

Please forgive my simplemindedness, but my understanding is that conservation of energy means that energy can change form, but it can`t simply flicker into and out of existence (at least when were not talking about the quantum vacuum). For example, your remark that… ...would be better...

My feeling is that MTd2's point is irrelevant since he may have failed to notice that version 1 of this paper was submitted to the archive only four weeks ago. It takes time for papers to acquire citations and some of us can tell when a paper is important before it's received any. IMHO, it...

I think it`s worth posting why this paper is so important, which is that in it the authors prove that "in ten dimensions, all supersymmetric theories of gravity without known inconsistencies are realized in string theory."

Maybe the post-Distler Garrett will be kind enough to discuss here at PF his thinking just as the pre-Distler Garret did.

A fine welcome to Physics Forums. Thank you very much marcus!

I think it's the other way round: Spacetime geometry is a structural property of the gravitational field, but only when the latter is not too strong. Thus we can have gravity without any kind of well defined spacetime. Put another way, spacetime is a property of the gravitational field which...