dc.creatorPONTE, M. A. de
dc.creatorCACHEFFO, A.
dc.creatorVILLAS-BOAS, C. J.
dc.creatorMIZRAHI, S. S.
dc.creatorMOUSSA, Miled Hassan Youssef
dc.date.accessioned2012-10-20T04:18:55Z
dc.date.accessioned2018-07-04T15:42:48Z
dc.date.available2012-10-20T04:18:55Z
dc.date.available2018-07-04T15:42:48Z
dc.date.created2012-10-20T04:18:55Z
dc.date.issued2010
dc.identifierEUROPEAN PHYSICAL JOURNAL D, v.59, n.3, p.487-496, 2010
dc.identifier1434-6060
dc.identifierhttp://producao.usp.br/handle/BDPI/29865
dc.identifier10.1140/epjd/e2010-00176-6
dc.identifierhttp://dx.doi.org/10.1140/epjd/e2010-00176-6
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1626505
dc.description.abstractIn this work, we identify the set of time-dependent pure states building the statistical mixture to which a system, initially in a pure state, is driven by the reservoir. This set of time-dependent pure states, composing what we term a pure basis, are those that diagonalize the reduced density operator of the system. Next, we show that the evolution of the pure-basis states reveals an interesting phenomenon as the system, after decoherence, evolves toward the equilibrium: the spontaneous recoherence of quantum states. Around our defined recoherence time, the statistical mixture associated with a special kind of initial states termed even-symmetric, spontaneously undergoes a recoherence process, by which the initial state of the system emerges from the mixture except for its reduced excitation drained into the reservoir. This phenomenon reveals that the reservoir only shuffle the original information carried out by the initial state of the system instead of erasing it. Moreover, as the spontaneously recohered state occurs only for asymptotic time, we also present a protocol to extract it from the mixture through specific projective measurements. The password to retrieve the original information stems is the knowledge of both the initial state itself and the associated pure basis. A definition of the decoherence time of an N-state superposition is also presented.
dc.languageeng
dc.publisherSPRINGER
dc.relationEuropean Physical Journal D
dc.rightsCopyright SPRINGER
dc.rightsrestrictedAccess
dc.titleSpontaneous recoherence of quantum states after decoherence
dc.typeArtículos de revistas


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