Anisotropic Spinfoam Cosmology
General Relativity and Quantum Cosmology
2013-11-21 v2
Abstract
The dynamics of a homogeneous, anisotropic universe are investigated within the context of spinfoam cosmology. Transition amplitudes are calculated for a graph consisting of a single node and three links - the `Daisy graph' - probing the behaviour a classical Bianchi I spacetime. It is shown further how the use of such single node graphs gives rise to a simplification of states such that all orders in the spin expansion can be calculated, indicating that it is the vertex expansion that contains information about quantum dynamics.
Cite
@article{arxiv.1308.0687,
title = {Anisotropic Spinfoam Cosmology},
author = {Julian Rennert and David Sloan},
journal= {arXiv preprint arXiv:1308.0687},
year = {2013}
}
Comments
31 pages, 1 figure, v2: substantial improvements. references added. journal version