Anisotropic Spinfoam Cosmology

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.

31 pages, 1 figure, v2: substantial improvements. references added. journal version

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Cited by in corpus (8)

• Cosmological implications of interacting Group Field Theory models: cyclic Universe and accelerated expansion
• Testing loop quantum cosmology
• Investigation of the Spinfoam Path integral with Quantum Cuboid Intertwiners
• Group field theory condensate cosmology: An appetizer
• 2-vertex Lorentzian Spin Foam Amplitudes for Dipole Transitions
• Markov Chain Monte Carlo methods for graph refinement in Spinfoam Cosmology
• Cosmological dynamics in spin-foam loop quantum cosmology: challenges and prospects
• On the dynamics of single-vertex states in quantum-reduced loop gravity