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JOURNALS // Uspekhi Fizicheskikh Nauk // Archive

UFN, 2020 Volume 190, Number 12, Pages 1335–1342 (Mi ufn6761)

This article is cited in 2 papers

METHODOLOGICAL NOTES

Wigner's friend paradox: does objective reality not exist?

A. V. Belinsky

Faculty of Physics, Lomonosov Moscow State University

Abstract: It is shown that the lack of objective existence of the results of quantum measurements of the state of collapse of the state vector of a remote localized system cannot be proved by an experiment using the reality of violation of Bell's inequality in the Clauser–Horne–Shimony–Holt form. Arguments of a general nature and a specific calculation example confirming this conclusion are also given.

Keywords: Wigner's friend paradox, quantum nondemolition measurements, Bell's inequality, Clauser–Horne–Shimony–Holt inequality, quantum state vector, von Neumann projection postulate, no-communication theorem.

PACS: 03.65.Ud, 42.65.Lm

Received: March 1, 2020
Revised: March 28, 2020
Accepted: May 15, 2020

DOI: 10.3367/UFNr.2020.05.038767


 English version:
Physics–Uspekhi, 2020, 63:12, 1256–1263

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