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Decoherence of adiabatically steered quantum systems

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Solinas, P.
dc.contributor.author Möttönen, M.
dc.contributor.author Salmilehto, J.
dc.contributor.author Pekola, Jukka P.
dc.date.accessioned 2015-05-26T09:01:07Z
dc.date.available 2015-05-26T09:01:07Z
dc.date.issued 2010
dc.identifier.citation Solinas, P. & Möttönen, M. & Salmilehto, J. & Pekola, Jukka. 2010. Decoherence of adiabatically steered quantum systems. Physical Review B. Volume 82, Issue 13. 134517/1-12. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.82.134517. en
dc.identifier.issn 1098-0121 (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/16221
dc.description.abstract We study the effect of Markovian environmental noise on the dynamics of a two-level quantum system which is steered adiabatically by an external driving field. We express the master equation taking consistently into account all the contributions to the lowest nonvanishing order in the coupling to the Markovian environment. We study the master equation numerically and analytically and we find that, in the adiabatic limit, a zero-temperature environment does not affect the ground-state evolution. As a physical application, we discuss extensively how the environment affects Cooper-pair pumping. The adiabatic ground-state pumping appears to be robust against environmental noise. In fact, the relaxation due to the environment is required to avoid the accumulation of small errors from each pumping cycle. We show that neglecting the nonsecular terms in the master equation leads to unphysical results, such as charge nonconservation. We discuss also a possible way to control the environmental noise in a realistic physical setup and its influence on the pumping process. en
dc.format.extent 134517/1-12
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Physical Society (APS) en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 82, Issue 13
dc.rights © 2010 American Physical Society (APS). http://www.aps.org/ en
dc.subject.other Physics en
dc.title Decoherence of adiabatically steered quantum systems en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Physical Society (APS)
dc.contributor.school Perustieteiden korkeakoulu fi
dc.contributor.school School of Science en
dc.contributor.department Department of Applied Physics en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.subject.keyword Markovian environment en
dc.subject.keyword noise en
dc.subject.keyword quantum systems en
dc.subject.keyword external driving fields en
dc.subject.keyword Cooper-pair pumping en
dc.identifier.urn URN:NBN:fi:aalto-201505262883
dc.type.dcmitype text en
dc.identifier.doi 10.1103/physrevb.82.134517
dc.type.version Final published version en

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