A theory of quantum gravity based on quantum computation

Details A theory of quantum gravity based on quantum computation A theory of quantum gravity based on quantum computation

2005-01-24

arxiv.org/abs/quant-ph/0501135v8

Physics

Quantum Physics

Plain TeX; 43 pages; 5 figures (pdf); this version with more extensive discussion of quantum cosmology

Scientific paper

This paper proposes a method of unifying quantum mechanics and gravity based on quantum computation. In this theory, fundamental processes are described in terms of pairwise interactions between quantum degrees of freedom. The geometry of space-time is a construct, derived from the underlying quantum information processing. The computation gives rise to a superposition of four-dimensional spacetimes, each of which obeys the Einstein-Regge equations. The theory makes explicit predictions for the back-reaction of the metric to computational `matter,' black-hole evaporation, holography, and quantum cosmology.

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