Causality Constraints on Nonlocal Quantum Measurements

Preprint

18 June 1993

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-th/9306087

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.

Keywords

MEASUREMENTS CONSEQUENCES
VERIFICATION MEASUREMENTS
NONLOCAL CHARACTERISTICS
RELATIVISTIC CAUSALITY
CAUSALITY CONSTRAINTS
QUANTUM MEASUREMENTS
NONLOCAL QUANTUM
PARTICLES

All Related Versions

Version 1, 1993-06-18, ArXiv
Published version: Physical Review A, 49 (6), 4331.

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