Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorBrody, DC-
dc.contributor.authorGraefe, E-M-
dc.identifier.citationPhysical Review Letters, 109(23): Article number 230405, 2012en_US
dc.descriptionCopyright @ 2012 American Physical Societyen_US
dc.description.abstractA model is proposed that describes the evolution of a mixed state of a quantum system for which gain and loss of energy or amplitude are present. Properties of the model are worked out in detail. In particular, invariant subspaces of the space of density matrices corresponding to the fixed points of the dynamics are identified, and the existence of a transition between the phase in which gain and loss are balanced and the phase in which this balance is lost is illustrated in terms of the time average of observables. The model is extended to include a noise term that results from a uniform random perturbation generated by white noise. Numerical studies of example systems show the emergence of equilibrium states that suppress the phase transition.en_US
dc.description.sponsorshipImperial Collegeen_US
dc.publisherAmerican Physical Societyen_US
dc.subjectMixed-state evolutionen_US
dc.subjectGain and lossen_US
dc.titleMixed-state evolution in the presence of gain and lossen_US
pubs.organisational-data/Brunel/Brunel Active Staff-
pubs.organisational-data/Brunel/Brunel Active Staff/School of Info. Systems, Comp & Maths-
pubs.organisational-data/Brunel/Brunel Active Staff/School of Info. Systems, Comp & Maths/Maths-
Appears in Collections:Mathematical Physics
Dept of Mathematics Research Papers
Mathematical Sciences

Files in This Item:
File Description SizeFormat 
Fulltext.pdf202.27 kBAdobe PDFView/Open

Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.