CAUSALITY CONSTRAINTS ON NONLOCAL QUANTUM MEASUREMENTS

S POPESCU, L VAIDMAN

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

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.

Original languageEnglish
Pages (from-to)4331-4338
Number of pages8
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Volume49
Issue number6
Publication statusPublished - Jun 1994

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