Recent content by Guymillion

Or does LQG involve discrete geometry, but not separate "chunks?" ------------------------------------------ From the article: Well, at least they said that some "strings" of gluons behave as a gravitons. I'm just trying to figure out what this has to do with the original idea, which was:

So, even though LQG involves spin networks, it is still continuous? It can just be used to get a discretization of GR? --------------------------------------------------- Ah, I found this: So, basically, a field is treated as a system with an infinite number of degrees of freedom? If you can...

It is my understanding from this article that this is a good way to describe certain aspects of reality, but it can't be a consistent version of quantum gravity, because our universe isn't anti-de Sitter space. To quote the article...

Yeah, I thought that it probably wasn't, but that's what came up when I looked for it. Thanks, I never would have found that information.

The Bekenstein bound just has to do with the amount of entropy in an area, not the quantum structure of spacetime, right? When he said string bits, was he talking about this: http://en.wikipedia.org/wiki/Bit-string_physics Thanks for all the help, guys. I have a lot of questions. :shy:

"If spacetime could be described by continuous classical fields with infinitely many degrees of freedom, then there would be no such limit. Therefore spacetime is discrete." I'm not quite certain how this conclusion is drawn. Is there any way we know how to describe spacetime using fields...

If spacetime can go into superposition, does that mean that there is a small probability that the distance between me and my computer could change slightly?

So they hope to get closer and closer approximations of quantum spacetime geometry, eventually getting rid of the 4-simplexes all together? They just haven't gotten there yet. Thanks for the help on phases, I was just completely lost there.

Thank you so much for that article, it helped me a lot. I had seen Renate Loll's lecture, (which can be found here: ) but this described more of the history of quantum gravity. So, just like particles, spacetime can go into superposition. This means that different geometries can overlap with...

That looks like a really good article, I'll take a good look at it.

Yeah, so basically I have no idea. :p

Sorry, I'm sure this was a perfect explanation, but I don't really understand it. What I got from this was that there are three phases: A, B, and C. They can transition from one to another. I'm new at this. :smile: Anyways, these three phases are placed in a phase diagram. However I'm not...

I was wondering how spacetime could be relative and quantized. It doesn't make sense to me. I am especially interested in how this works in causal dynamical triangulation. I think it is a very interesting theory, and it sometimes doesn't get enough credit. But, I can't understand how at a tiny...

I had three questions that had to do with spacetime, digital physics, and the holographic principle: 1. Why are there dimensions in space? 2. Why isn't there just some sort of information matrix as suggested in digital physics? 3. How do these two ideas work with the holographic principle?

Thanks! That helps me understand!