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The measure of PBR's reality

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arxiv 1810.11072 v1 pith:L7UDSHR3 submitted 2018-10-25 quant-ph

Natalia Sánchez-Kuntz , Eduardo Nahmad-Achar This is my paper · ORCID
classification quant-ph
keywords realitystatebeenmeasuredregardedsystemtheoremarrive
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abstract

We review the Pusey-Barret-Rudolph (PBR) theorem\cite{PBR} and their setup, and arrive to the conclusion that the reality of a quantum state $\psi$ is intrinsically attached to the measurement the system described by $\psi$ has undergone. We show that a state that has not been measured can be regarded as pure information, while a state that has been measured has to be regarded as a physical property of a certain system, having a counterpart in reality. This demonstration implies that the statement of PBR's theorem changes in a meaningful way.

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