Is the graviton the only thing to find in LQG?

[wabbit]

I'm curious about this: how does the existence of this "surface" layer jive with Relativity's idea that there is no absolute "present"? Wouldn't that mean different observers would disagree on how the "heap" has grown?

In my view it certainly does. The "evolving surface layer" is a quantum version of a 3+1 foliation in GR, associated with a class of observers.

Also of course the view of "a present" or "the passage of time" is, here as in GR, a matter of perspective, one can equally well adopt the "unchanging spacetime" viewpoint.

 

[Talleyrand]

I enjoyed reading this thread.