Lower limit on decoherence introduced by entangling two spatially-separated qubits

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dc.creatorFisher, A. J.
dc.date2002-11-29
dc.date.accessioned2026-07-07T06:05:38Z
dc.date.available2026-07-07T06:05:38Z
dc.descriptionIt is shown that a generalization of the fluctuation-dissipation theorem places an upper bound on the figure of merit for any quantum gate designed to entangle spatially-separated qubits. The bound depends solely on the spectral properties of the environment. The bound applies even to systems performing a quantum computation within a decoherence-free subspace, but might be optimized by the use of non-equilibrium squeezed states of the environment, or by using an environment system constructed to have response confined to certain frequencies.
dc.description4 pages, RevTex4 macros, no figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0211200
dc.identifierhttp://arxiv.org/abs/quant-ph/0211200
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/90701
dc.subjectQuantum Physics
dc.titleLower limit on decoherence introduced by entangling two spatially-separated qubits
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