2006/01/03 by Dorje C. Brody, Brody, Dorje C., Lane P. Hughston +1
Physics and Astronomy · #FOS: Physical sciences #Quantum Physics (quant-ph) #quant-ph
paper · pdf · doi:10.48550/arxiv.quant-ph/0601020
9 pages, to appear in the Proceedings of the 2nd International Symposium on Information Geometry and its Applications
arxiv created 2006/01/03 · arxiv updated 2009/12/01
Space-time symmetries and internal quantum symmetries can be placed on equal footing in a hyperspin geometry. Four-dimensional classical space-time emerges as a result of a decoherence that disentangles the quantum and the space-time degrees of freedom. A map from the quantum space-time to classical space-time that preserves the causality relations of space-time events is necessarily a density matrix.