Dynamics of Open Quantum Systems Using Parametric Representation with Coherent States (Articolo in rivista)

Type
Label
  • Dynamics of Open Quantum Systems Using Parametric Representation with Coherent States (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1142/S1230161213400027 (literal)
Alternative label
  • Dario Calvani (1); Alessandro Cuccoli (1); Nikitas I. Gidopoulos (2); Paola Verrucchi (3) (2013)
    Dynamics of Open Quantum Systems Using Parametric Representation with Coherent States
    in Open systems & information dynamics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Dario Calvani (1); Alessandro Cuccoli (1); Nikitas I. Gidopoulos (2); Paola Verrucchi (3) (literal)
Pagina inizio
  • 1340002 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.worldscientific.com/doi/abs/10.1142/S1230161213400027 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 20 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 12 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Dipartimento di Fisica, Università di Firenze, Italy and INFN sezione di Firenze via G.Sansone 1, 50019 Sesto Fiorentino, Italy (2) ISIS, STFC, Rutherford Appleton Laboratory, Didcot OX11 0QX, United Kingdom and Department of Physics, Durham University, Durham DH1 3LE, United Kingdom (3) Istituto dei Sistemi Complessi CNR, Italy and Dipartimento di Fisica, Università di Firenze, Italy and INFN sezione di Firenze, via G.Sansone 1, 50019 Sesto Fiorentino, Italy (literal)
Titolo
  • Dynamics of Open Quantum Systems Using Parametric Representation with Coherent States (literal)
Abstract
  • Open quantum systems and their dynamics are usually studied in terms of reduced density matrices. This approach allows a nonsymmetric description, which is useful when one of the two subsystems is to be considered an environment, at the expense of a loss of information, as tracing out the environmental degrees of freedom is an irreversible process. This has a series of consequences which can be severe. In this work we present an alternative description, which is still nonsymmetric but yet exact: It is based on a parametric representation of composite systems, as obtained by introducing environmental coherent states, such that the principal system get to be described by a set of pure states parametrically dependent on environmental variables. The representation allows one to relate properties which typically arise in studying systems with parametrically dependent Hamiltonians, such as the emergence of geometrical phases, with features which specifically characterize open quantum systems, such as decoherence and entanglement generation. (literal)
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