Phonon decoherence of quantum entanglement: Robust and fragile states

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dc.creatorYu, T.
dc.creatorEberly, J. H.
dc.date2002-09-04
dc.date.accessioned2026-07-07T08:55:43Z
dc.date.available2026-07-07T08:55:43Z
dc.descriptionWe study the robustness and fragility of entanglement of open quantum systems in some exactly solvable models in which the decoherence is caused by a pure dephasing process. In particular, for the toy models presented in this paper, we identify two different time scales, one is responsible for local dephasing, while the other is for entanglement decay. For a class of fragile entangled states defined in this paper, we find that the entanglement of two qubits, as measured by concurrence, decays faster asymptotically than the quantum dephasing of an individual qubit.
dc.description11 pages, revtex, no figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0209037
dc.identifierhttp://arxiv.org/abs/quant-ph/0209037
dc.identifierPhys. Rev. B, 66 (2002) 193306
dc.identifierdoi:10.1103/PhysRevB.66.193306
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/146360
dc.subjectQuantum Physics
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titlePhonon decoherence of quantum entanglement: Robust and fragile states
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