Positive phase space transformation incompatible with classical physics

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dc.creatorSon, Wonmin
dc.creatorKofler, Johannes
dc.creatorKim, M. S.
dc.creatorVedral, Vlatko
dc.creatorBrukner, Caslav
dc.date2008-10-08
dc.date2009-03-20
dc.date.accessioned2026-07-07T13:01:02Z
dc.date.available2026-07-07T13:01:02Z
dc.descriptionBell conjectured that a positive Wigner function does not allow violation of the inequalities imposed by local hidden variable theories. A requirement for this conjecture is "when phase space measurements are performed". We introduce the theory-independent concept of "operationally local transformations" which refers to the change of the switch on a local measurement apparatus. We show that two separated parties, performing only phase space measurements on a composite quantum system with a positive Wigner function and performing only operationally local transformations that preserve this positivity, can nonetheless violate Bell's inequality. Such operationally local transformations are realized using entangled ancillae.
dc.description4 pages, 1 figure, published version
dc.identifierhttps://arxiv.org/abs/0810.1457
dc.identifierhttp://arxiv.org/abs/0810.1457
dc.identifierPhys.Rev.Lett.102:110404,2009
dc.identifierdoi:10.1103/PhysRevLett.102.110404
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/226032
dc.subjectQuantum Physics
dc.titlePositive phase space transformation incompatible with classical physics
dc.typetext

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