Correlated versus uncorrelated noise acting on a quantum refrigerator

Simple item page
dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorKarimi, Bayan
dc.contributor.authorPekola, Jukka P.
dc.contributor.departmentQuantum Phenomena and Devices
dc.contributor.departmentDepartment of Applied Physics
dc.date.accessioned2017-10-15T20:55:45Z
dc.date.available2017-10-15T20:55:45Z
dc.date.issued2017-09-05
dc.description.abstractTwo qubits form a quantum four-level system. The golden-rule based transition rates between these states are determined by the coupling of the qubits to noise sources. We demonstrate that depending on whether the noise acting on the two qubits is correlated or not, these transitions are governed by different selection rules. In particular, we find that for fully correlated or anticorrelated noise, there is a protected state, and the dynamics of the system depends then on its initialization. For nearly (anti)correlated noise, there is a long time scale determining the temporal evolution of the qubits. We apply our results to a quantum Otto refrigerator based on two qubits coupled to hot and cold baths. The steady-state power does not scale with the number (=2 here) of the qubits when there is a strong correlation of noise acting on them; under driven conditions the highest cooling power of the refrigerator is achieved for fully uncorrelated baths.en
dc.description.versionPeer revieweden
dc.format.extent1-5
dc.format.mimetypeapplication/pdf
dc.identifier.citationKarimi , B & Pekola , J P 2017 , ' Correlated versus uncorrelated noise acting on a quantum refrigerator ' , Physical Review B , vol. 96 , no. 11 , 115408 , pp. 1-5 . https://doi.org/10.1103/PhysRevB.96.115408en
dc.identifier.doi10.1103/PhysRevB.96.115408
dc.identifier.issn2469-9950
dc.identifier.issn1550-235X
dc.identifier.otherPURE UUID: cde627c9-fb91-4846-8a1b-de184b3565b5
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/cde627c9-fb91-4846-8a1b-de184b3565b5
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85030110675&partnerID=8YFLogxK
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/15720751/PhysRevB.96.115408.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/28302
dc.identifier.urnURN:NBN:fi:aalto-201710157162
dc.language.isoenen
dc.relation.ispartofseriesPhysical Review Ben
dc.relation.ispartofseriesVolume 96, issue 11en
dc.rightsopenAccessen
dc.titleCorrelated versus uncorrelated noise acting on a quantum refrigeratoren
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
Files
Collections
[article-cris] Perustieteiden korkeakoulu / SCI