Wigner's friend paradox: does objective reality not exist?
A.V. Belinsky† Lomonosov Moscow State University, Department of Physics, Leninskie Gory 1 build. 2, Moscow, 119991, Russian Federation
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 (all) DOI:10.3367/UFNe.2020.05.038767 URL: https://ufn.ru/en/articles/2020/12/d/ Citation: Belinsky A V "Wigner's friend paradox: does objective reality not exist?" Phys. Usp.63 1256–1263 (2020)