Critical assessment of two-qubit post-Markovian master equations

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dc.contributor.authorCampbell, Steve
dc.contributor.authorSmirne, A.
dc.contributor.authorMazzola, L.
dc.contributor.authorLo Gullo, Nicola
dc.contributor.authorVacchini, B.
dc.contributor.authorBusch, Thomas
dc.contributor.authorPaternostro, Mauro
dc.contributor.funderDepartment for Employment and Learning, Northern Ireland
dc.contributor.funderMagnus Ehrnroothin Säätiö
dc.contributor.funderMinistero dell’Istruzione, dell’Università e della Ricerca
dc.contributor.funderEuropean Cooperation in Science and Technology
dc.contributor.funderScience Foundation Ireland
dc.contributor.funderIrish Research Council for Science, Engineering and Technology
dc.contributor.funderEngineering and Physical Sciences Research Council
dc.date.accessioned2017-08-22T10:30:37Z
dc.date.available2017-08-22T10:30:37Z
dc.date.issued2012
dc.description.abstractA post-Markovian master equation has been recently proposed as a tool to describe the evolution of a system coupled to a memory-keeping environment [A. Shabani and D. A. Lidar, Phys. Rev. A 71, 020101 ( R) ( 2005)]. For a single qubit affected by appropriately chosen environmental conditions, the corresponding dynamics is always legitimate and physical. Here we extend such a situation to the case of two qubits, only one of which experiences the environmental effects. We show how, despite the innocence of such an extension, the introduction of the second qubit should be done cum grano salis to avoid consequences such as the breaking of the positivity of the associated dynamical map. This hints at the necessity of using care when adopting phenomenologically derived models for evolutions occurring outside the Markovian framework.en
dc.description.sponsorshipEuropean Cooperation in Science and Technology (MP1006); Science Foundation Ireland (10/IN.1/I2979); Irish Research Council for Science, Engineering and Technology (Embark initiative (RS/2000/137); Engineering and Physical Sciences Research Council (EP/G004759/1)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid32120
dc.identifier.citationCampbell, S., Smirne, A., Mazzola, L., Lo Gullo, N., Vacchini, B., Busch, T. and Paternostro, M. (2012) 'Critical assessment of two-qubit post-Markovian master equations', Physical Review A, 85(3), 032120 (6pp). doi: 10.1103/PhysRevA.85.032120en
dc.identifier.doi10.1103/PhysRevA.85.032120
dc.identifier.issn1050-2947
dc.identifier.issued3
dc.identifier.journaltitlePhysical Review Aen
dc.identifier.urihttps://hdl.handle.net/10468/4503
dc.identifier.volume85
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.85.032120
dc.rights© 2012, American Physical Societyen
dc.subjectDynamical semigroupsen
dc.subjectQuantumen
dc.subjectSystemsen
dc.titleCritical assessment of two-qubit post-Markovian master equationsen
dc.typeArticle (peer-reviewed)en
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