Extended Wigner's friend problem and the internal consistency of standard quantum mechanics

• URL: http://arxiv.org/abs/2102.08709v3
• Date: Tue, 1 Jun 2021 15:03:57 GMT
• Title: Extended Wigner's friend problem and the internal consistency of standard quantum mechanics
• Authors: D.Sokolovski and A.Matzkin
• Abstract summary: We investigate the Wigner's friend problem by relying on the basic rules of quantum mechanics as exposed by Feynman. Although recent discussions have suggested that the extended Wigner's friend problem cannot consistently be described by quantum theory, we show here that a straightforward application of these standard rules results in a non-ambiguous and consistent account of the measurement outcomes for all agents involved.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The extended Wigner's friend problem deals with two Observers each measuring a sealed laboratory in which a friend is making a quantum measurement. We investigate this problem by relying on the basic rules of quantum mechanics as exposed by Feynman in the well-known "Feynman Lectures on Physics". Although recent discussions have suggested that the extended Wigner's friend problem cannot consistently be described by quantum theory, we show here that a straightforward application of these standard rules results in a non-ambiguous and consistent account of the measurement outcomes for all agents involved.

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