Background independence in a nutshell

Details Background independence in a nutshell Background independence in a nutshell

2004-08-24

arxiv.org/abs/gr-qc/0408079v1

Class.Quant.Grav. 22 (2005) 2971-2990

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

19 pages, 19 figures

Scientific paper

10.1088/0264-9381/22/14/008

We study how physical information can be extracted from a background independent quantum system. We use an extremely simple `minimalist' system that models a finite region of 3d euclidean quantum spacetime with a single equilateral tetrahedron. We show that the physical information can be expressed as a boundary amplitude. We illustrate how the notions of "evolution" in a boundary proper-time and "vacuum" can be extracted from the background independent dynamics.

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