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arxiv: 1810.11072 · v1 · pith:L7UDSHR3new · submitted 2018-10-25 · 🪐 quant-ph

The measure of PBR's reality

classification 🪐 quant-ph
keywords realitystatebeenmeasuredregardedsystemtheoremarrive
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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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