All local quantum states are mixtures of direct products

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dc.creatorDiosi, Lajos
dc.date1995-06-06
dc.date.accessioned2026-07-07T06:13:33Z
dc.date.available2026-07-07T06:13:33Z
dc.descriptionAccording to Popescu's recent analysis [Phys. Rev. Lett. {\bf72}, 797 (1994)], {\it nonideal} measurements, rather than ideal ones, may be more sensitive to reveal nonlocal correlations between distant parts of composite quantum systems. The outcome statistics of joint nonideal measurements on local states should by definition admit local hidden variable models. We prove that the density operator of a local composite system must be convex mixture of the subsystems' density operators. This result depends essentially on a plausible consistency condition restricting the class of admissible local hidden variable models.
dc.description7pp LaTex
dc.identifierhttps://arxiv.org/abs/quant-ph/9506004
dc.identifierhttp://arxiv.org/abs/quant-ph/9506004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/93146
dc.subjectQuantum Physics
dc.titleAll local quantum states are mixtures of direct products
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