QBism and the Greeks: why a quantum state does not represent an element of physical reality

CA Fuchs, R Schack - Physica Scripta, 2014 - iopscience.iop.org
Physica Scripta, 2014iopscience.iop.org
Abstract In QBism (or quantum Bayesianism) a quantum state does not represent an
element of physical reality but an agentʼs personal probability assignments, reflecting his
subjective degrees of belief about the future content of his experience. In this paper, we
contrast QBism with hidden-variable accounts of quantum mechanics and show the sense in
which QBism explains quantum correlations. QBismʼs agent-centered worldview can be
seen as a development of ideas expressed in Schrödingerʼs essay'Nature and the Greeks'.
Abstract
In QBism (or quantum Bayesianism) a quantum state does not represent an element of physical reality but an agentʼs personal probability assignments, reflecting his subjective degrees of belief about the future content of his experience. In this paper, we contrast QBism with hidden-variable accounts of quantum mechanics and show the sense in which QBism explains quantum correlations. QBismʼs agent-centered worldview can be seen as a development of ideas expressed in Schrödingerʼs essay'Nature and the Greeks'.
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