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Existence of superluminal signaling in collapse theories of quantum mechanics

Gao, Shan (2022) Existence of superluminal signaling in collapse theories of quantum mechanics. [Preprint]

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Abstract

It is usually thought that superluminal signaling is prohibited in collapse theories of quantum mechanics. In this paper, I argue that this is not the case when considering the tails problem and its solution. In collapse theories, the post-measurement state of a measuring device or an observer is a definite result state with tails containing other results. This leads to the well-known tails problem. In order to solve this problem, collapse theories have to assume that a measuring device or an observer being in a post-measurement superposition already obtains a definite result. It is argued that this solution to the tails problem will in principle permit that two ensembles with the same density matrix can be distinguished, which further leads to the existence of superluminal signaling.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Gao, Shansgao7319@uni.sydney.edu.au
Keywords: quantum mechanics; collapse theories; tails problem; superluminal signaling
Subjects: Specific Sciences > Physics > Quantum Mechanics
Specific Sciences > Physics > Relativity Theory
Depositing User: Prof. Shan Gao
Date Deposited: 02 Jun 2022 15:36
Last Modified: 02 Jun 2022 15:36
Item ID: 20704
Subjects: Specific Sciences > Physics > Quantum Mechanics
Specific Sciences > Physics > Relativity Theory
Date: 31 May 2022
URI: https://philsci-archive-dev.library.pitt.edu/id/eprint/20704

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