Complete positivity, finite-temperature effects, and additivity of noise for time-local qubit dynamics

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dc.contributor.authorJuho Lankinen
dc.contributor.authorHenri Lyyra
dc.contributor.authorBoris Sokolov
dc.contributor.authorJose Teittinen
dc.contributor.authorBabak Ziaei
dc.contributor.authorand Sabrina Maniscalco
dc.contributor.organizationfi=teoreettisen fysiikan laboratorio|en=Laboratory of Theoretical Physics|
dc.contributor.organization-code1.2.246.10.2458963.20.14547848953
dc.contributor.organization-code2606703
dc.converis.publication-id17751469
dc.converis.urlhttps://research.utu.fi/converis/portal/Publication/17751469
dc.date.accessioned2022-10-28T13:54:11Z
dc.date.available2022-10-28T13:54:11Z
dc.description.abstract<p>We present a general model of qubit dynamics which entails pure dephasing and dissipative time-local master equations. This allows us to describe the combined effect of thermalization and dephasing beyond the usual Markovian approximation. We investigate the complete positivity conditions and introduce a heuristic model that is always physical and provides the correct Markovian limit. We study the effects of temperature on the non-Markovian behavior of the system and show that the noise additivity property discussed by Yu and Eberly [<a href="http://dx.doi.org/10.1103/PhysRevLett.97.140403">Phys. Rev. Lett. <b>97</b>, 140403 (2006)</a>] holds beyond the Markovian limit.</p>
dc.identifier.eissn2469-9934
dc.identifier.jour-issn1050-2947
dc.identifier.olddbid185071
dc.identifier.oldhandle10024/168165
dc.identifier.urihttps://www.utupub.fi/handle/11111/41984
dc.identifier.urlhttp://journals.aps.org/pra/abstract/10.1103/PhysRevA.93.052103
dc.identifier.urnURN:NBN:fi-fe2021042715848
dc.language.isoen
dc.okm.affiliatedauthorLankinen, Juho
dc.okm.affiliatedauthorTeittinen, Jose
dc.okm.affiliatedauthorManiscalco, Sabrina
dc.okm.affiliatedauthorSokolov, Boris
dc.okm.affiliatedauthorLyyra, Henri
dc.okm.discipline114 Physical sciencesen_GB
dc.okm.discipline114 Fysiikkafi_FI
dc.okm.internationalcopublicationnot an international co-publication
dc.okm.internationalityInternational publication
dc.okm.typeA1 ScientificArticle
dc.publisherAmerican Phyiscal Society
dc.publisher.countryUnited Statesen_GB
dc.publisher.countryYhdysvallat (USA)fi_FI
dc.publisher.country-codeUS
dc.relation.articlenumber052103
dc.relation.doi10.1103/PhysRevA.93.052103
dc.relation.ispartofjournalPhysical Review A
dc.relation.issue5
dc.relation.volume93
dc.source.identifierhttps://www.utupub.fi/handle/10024/168165
dc.titleComplete positivity, finite-temperature effects, and additivity of noise for time-local qubit dynamics
dc.year.issued2016

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