Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2004-08-24
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.
Colosi Daniele
Doplicher Luisa
Fairbairn Winston
Modesto Leonardo
Noui Karim
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