Quantum Theory and Spacelike Measurements

Details Quantum Theory and Spacelike Measurements Quantum Theory and Spacelike Measurements

1998-01-04

arxiv.org/abs/quant-ph/9801003v1

Physics

Quantum Physics

14 pages latex and 1 postscript figure in one file

Scientific paper

Experimentally observed violations of Bell inequalities rule out local realistic theories. Consequently, the quantum state vector becomes a strong candidate for providing an objective picture of reality. However, such an ontological view of quantum theory faces difficulties when spacelike measurements on entangled states have to be described, because time ordering of spacelike events can change under Lorentz-Poincar\'e transformations. In the present paper it is shown that a necessary condition for consistency is to require state vector reduction on the backward light-cone. A fresh approach to the quantum measurement problem appears feasible within such a framework.

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