By the same authors

General Probabilistic Theories with a Gleason-type Theorem

Research output: Working paperPreprint

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DateAccepted/In press - 12 Nov 2021
Original languageEnglish

Publication series

NameQuantum
PublisherVerein zur Forderung des Open Access Publizierens in den Quantenwissenschaften
ISSN (Print)2521-327X

Abstract

Gleason-type theorems for quantum theory allow one to recover the quantum state space by assuming that (i) states consistently assign probabilities to measurement outcomes and that (ii) there is a unique state for every such assignment. We identify the class of general probabilistic theories
which also admit Gleason-type theorems. It contains theories satisfying the
no-restriction hypothesis as well as others which can simulate such an unrestricted theory arbitrarily well when allowing for post-selection on measurement outcomes. Our result also implies that the standard no-restriction hypothesis applied to effects is not equivalent to the dual no-restriction hypothesis applied to states which is found to be less restrictive.

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