Recent content by Bareil

Concerning non-gravitational matter fields in LQG, I found this resource: http://www.aei.mpg.de/pdf/doctoral/HSahlmann_02.pdf In chapter 5.1, as far as I can see, it is derived for Klein-Gordon field that the field is simply defined on the vertices of the spin network and the dynamics of...

some news about my idea of node relocation process: such relocation is problematic when one regards the background independence of LQG. If spin network had a fixed, predefined structure, one could consider it like a chess board, and node relocations like the move of a Queen from one field to...

I guess in the most cases, it's just a matter of personal flavour. As an analogue example from history, take the theory of light. Starting from 17th century, there were particle theory and light theory, founded by Newton and Huygens, and until beginning 19th century, no empiric way to decide...

hm, you mean by observation of high energy photons coming in from a... gamma burst, I think, where photons have been observed as swlower instead of faster? I heard LQG predicts a slower light speed for high energy: http://www.edge.org/3rd_culture/smolin03/smolin03_print.html

May be it's interesting what my original intention has been :smile: My idea was (or still is) to extend LQG, in a way that it enables particles to travel faster than the light. This requires two steps: first, we need a preferred frame of reference, to have an absolute simultanity to prevent...

hm, I thought it would be clear that the presence of a particle in a point of space would simply mean that a spin has same additional properties? And as far as I know, LQG is able to predict different speeds of light for different EM radiation frequencies, this indicates LQG must ship a...

Hello everyone, I'm currently occupying myself with Loop Quantum Gravity and wonder about some question. In LQG, space is built up from a spin network. However, how is movement of material particles realized in this network? One could tend to the idea, particles are simply hopping from one...