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dc.contributor.authorRelaño Pérez, Armando
dc.contributor.authorArias Carrasco, José Miguel
dc.contributor.authorDukelsky, J.
dc.contributor.authorGarcía Ramos, José Enrique 
dc.contributor.authorPérez Fernández, Pedro
dc.identifier.citationRelaño Pérez, A., Arias Carrasco, J.M., Dukelsky, J., García Ramos, J.E.: "Decoherence as a signature of an excited state quantum phase transition". Physical Review A . Vol. 78, n. 6 (2008). ISSN 1050-2947en_US
dc.description.abstractWe analyze the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal dynamics. We explore how the decoherence process is affected by the presence of quantum phase transitions in the environment. We conclude that the dynamics of the qubit changes dramatically when the environment passes through a continuous excited state quantum phase transition. If the system-environment coupling energy equals the energy at which the environment has a critical behavior, the decoherence induced on the qubit is maximal and the fidelity tends to zero with finite size scaling obeying a power-law.en_US
dc.publisherAmerican Physical Societyen_US
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España
dc.titleDecoherence as a signature of an excited state quantum phase transitionen_US

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