On the phenomenon of emergent spacetimes: An instruction guide for experimental cosmology
Abstract
We present a toy model where spacetime is emergent from a more fundamental microscopic system, and investigate the gray area interpolating between the collective and free-particle regimes. For a period of rapid exponential growth in the analogue universe, we argue that the intermediate regime is best described by a coloured potpourri of geometries -- a "rainbow geometry". This can be viewed as an alternative approach towards understanding quantum field theories in the presence of Lorentz-symmetry breaking at ultraviolet scales. Firstly, it is pointed out that cosmological particle production in our emergent FRW-type analogue universe, when compared to conventional semi-classical quantum gravity, is only temporarily robust against model-specific deviations from Lorentz invariance. Secondly, it is possible to carry out a straightforward quantitative analysis to estimate a suitable parameter regime for experimental (analogue) cosmology.
Keywords
Cite
@article{arxiv.0804.1346,
title = {On the phenomenon of emergent spacetimes: An instruction guide for experimental cosmology},
author = {Silke Weinfurtner and Matt Visser and Piyush Jain and C. W. Gardiner},
journal= {arXiv preprint arXiv:0804.1346},
year = {2009}
}
Comments
19 pages; Based on a talk at the conference: From Quantum to Emergent Gravity: Theory and Phenomenology, June 11-15 2007, Trieste, Italy