A Finite de Finetti Theorem for Infinite-Dimensional Systems

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dc.creatorD'Cruz, Christian
dc.creatorOsborne, Tobias J.
dc.creatorSchack, Ruediger
dc.date2006-06-16
dc.date2007-03-08
dc.date.accessioned2026-07-07T07:59:13Z
dc.date.available2026-07-07T07:59:13Z
dc.descriptionWe formulate and prove a de Finetti representation theorem for finitely exchangeable states of a quantum system consisting of k infinite-dimensional subsystems. The theorem is valid for states that can be written as the partial trace of a pure state chosen from a family of subsets C_n of the full symmetric subspace for $n$ subsystems. We show that such states become arbitrarily close to mixtures of pure power states as n increases. We give a second equivalent characterization of the family C_n.
dc.description4 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0606139
dc.identifierhttp://arxiv.org/abs/quant-ph/0606139
dc.identifierPhys. Rev. Lett. 98, 160406 (2007)
dc.identifierdoi:10.1103/PhysRevLett.98.160406
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/128289
dc.subjectQuantum Physics
dc.titleA Finite de Finetti Theorem for Infinite-Dimensional Systems
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