Quantum states and space-time causality

Details Quantum states and space-time causality Quantum states and space-time causality

2006-01-03

arxiv.org/abs/quant-ph/0601020v1

Physics

Quantum Physics

9 pages, to appear in the Proceedings of the 2nd International Symposium on Information Geometry and its Applications

Scientific paper

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.

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