Quantum Theory and Spacelike Measurements
نویسنده
چکیده
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-Poincaré 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. PACS 03.65Bz Foundations, theory of measurement, miscellaneous theories. Work partially supported by the Department of Energy under contract DE-FG05-87ER40319. Department of Physics, The Florida State University, Tallahassee, FL 32306, USA. Supercomputer Computations Research Institute, Tallahassee, FL 32306, USA.
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