Causality constraints on nonlocal quantum measurements.
نویسندگان
چکیده
Service de Physique Théorique Université Libre de Bruxelles Campus Plaine CP 225, Bld du Triomphe 1050 Bruxelles, BELGIUM Lev Vaidman School of Physics and Astronomy Raymond and Beverly Sackler Faculty of Exact Sciences Tel-Aviv University, Tel-Aviv, 69978 ISRAEL BITNET: [email protected] Consequences of relativistic causality for measurements of nonlocal characteristics of composite quantum systems are investigated. It is proved that verification measurements of entangled states necessarily erase local information. A complete analysis of measurability of nondegenerate spin operators of a system of two spin-1/2 particles is presented. It is shown that measurability of certain projection operators which play an important role in axiomatic quantum theory contradicts the causality principle.
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ورودعنوان ژورنال:
- Physical review. A, Atomic, molecular, and optical physics
دوره 49 6 شماره
صفحات -
تاریخ انتشار 1994