Entanglement verification for quantum key distribution systems with an underlying bipartite qubit-mode structure

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dc.creatorRigas, Johannes
dc.creatorGühne, Otfried
dc.creatorLütkenhaus, Norbert
dc.date2005-10-03
dc.date2006-01-30
dc.date.accessioned2026-07-07T06:48:39Z
dc.date.available2026-07-07T06:48:39Z
dc.descriptionWe consider entanglement detection for quantum key distribution systems that use two signal states and continuous variable measurements. This problem can be formulated as a separability problem in a qubit-mode system. To verify entanglement, we introduce an object that combines the covariance matrix of the mode with the density matrix of the qubit. We derive necessary separability criteria for this scenario. These criteria can be readily evaluated using semidefinite programming and we apply them to the specific quantum key distribution protocol.
dc.description6 pages, 2 figures, v2: final version
dc.identifierhttps://arxiv.org/abs/quant-ph/0510022
dc.identifierhttp://arxiv.org/abs/quant-ph/0510022
dc.identifierPhys. Rev. A 73, 012341 (2006)
dc.identifierdoi:10.1103/PhysRevA.73.012341
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/104091
dc.subjectQuantum Physics
dc.titleEntanglement verification for quantum key distribution systems with an underlying bipartite qubit-mode structure
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