Critical assessment of two-qubit post-Markovian master equations

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dc.contributor.author Campbell, Steve
dc.contributor.author Smirne, A.
dc.contributor.author Mazzola, L.
dc.contributor.author Lo Gullo, Nicola
dc.contributor.author Vacchini, B.
dc.contributor.author Busch, Thomas
dc.contributor.author Paternostro, Mauro
dc.date.accessioned 2017-08-22T10:30:37Z
dc.date.available 2017-08-22T10:30:37Z
dc.date.issued 2012
dc.identifier.citation Campbell, 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.85.032120 en
dc.identifier.volume 85
dc.identifier.issued 3
dc.identifier.issn 1050-2947
dc.identifier.uri http://hdl.handle.net/10468/4503
dc.identifier.doi 10.1103/PhysRevA.85.032120
dc.description.abstract A 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.sponsorship European 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.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society en
dc.relation.uri https://journals.aps.org/pra/abstract/10.1103/PhysRevA.85.032120
dc.rights © 2012, American Physical Society en
dc.subject Dynamical semigroups en
dc.subject Quantum en
dc.subject Systems en
dc.title Critical assessment of two-qubit post-Markovian master equations en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Steve Campbell, Physics, University College Cork, Cork, Ireland. +353-21-490-3000. Email: scampbell@phys.ucc.ie en
dc.internal.availability Full text available en
dc.description.version Published Version en
dc.internal.wokid WOS:000301643200002
dc.contributor.funder Department for Employment and Learning, Northern Ireland
dc.contributor.funder Magnus Ehrnroothin Säätiö
dc.contributor.funder Ministero dell’Istruzione, dell’Università e della Ricerca
dc.contributor.funder European Cooperation in Science and Technology
dc.contributor.funder Science Foundation Ireland
dc.contributor.funder Irish Research Council for Science, Engineering and Technology
dc.contributor.funder Engineering and Physical Sciences Research Council
dc.description.status Peer reviewed en
dc.identifier.journaltitle Physical Review A en
dc.internal.IRISemailaddress scampbell@phys.ucc.ie en
dc.identifier.articleid 32120


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