Title: A simple test of quantumness for a single system
Authors: Alicki, Robert *
Van Ryn, Nicholas * # ×
Issue Date: Feb-2008
Publisher: Institute of Physics Publishing
Series Title: Journal of Physics A, Mathematical and Theoretical vol:41 issue:6 pages:-
Article number: 062001
Abstract: We propose a simple test of quantumness which can decide whether for a given set of accessible experimental data the classical model is insufficient. Take two observables A, B such that for all states. their mean values satisfy 0 <= <psi |A | psi > <= <psi | B | psi > <= 1. If there exists a state phi such that the second moments fulfill the inequality <phi | A(2)| phi > > <phi| B-2| phi > then the system cannot be described by a classical probabilistic scheme. An example of an optimal triple ( A, B, f) in the case of a qubit is given.
ISSN: 1751-8113
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
* (joint) first author
× corresponding author
# (joint) last author

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