Wigner's friend, Feynman's paths and material records

• URL: http://arxiv.org/abs/2009.01113v1
• Date: Wed, 2 Sep 2020 14:42:53 GMT
• Title: Wigner's friend, Feynman's paths and material records
• Authors: A. Matzkin, D. Sokolovski
• Abstract summary: Wigner brought this question to the fore in a celebrated scenario in which a super-Observer observes a Friend making a measurement. We will argue that quantum theory can consistently leave observers outside its narrative.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The place and role of an Observer in quantum mechanics has been a subject of an ongoing debate since the theory's inception. Wigner brought this question to the fore in a celebrated scenario in which a super-Observer observes a Friend making a measurement. Here we briefly review why this \e{Wigner Friend scenario} has been taken to require the introduction of the Observer's consciousness, or alternatively to show the inconsistency of quantum measurement theory. We will argue that quantum theory can consistently leave observers outside its narrative, by making only minimal assumptions about how the information about the observed results is stored in material records.

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