On the spinfoam expansion in cosmology

Abstract

We consider the technique introduced in a recent work by Ashtekar, Campiglia and Henderson, which generate a spinfoam-like sum from a Hamiltonian theory. We study the possibility of using it for finding the generalized projector of a constraint on physical states, without first deparametrising the system. We illustrate this technique in the context of a very simple example. We discuss the infinities that appear in the calculation, and argue that they can be appropriately controlled. We apply these ideas to write a spinfoam expansion for the "dipole cosmology".

6 pages (typos corrected)

References in corpus (2)

• Stepping out of Homogeneity in Loop Quantum Cosmology
• Triangulated Loop Quantum Cosmology: Bianchi IX and inhomogenous perturbations

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