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Coherence protection in coupled quantum systems

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dc.contributor.authorCammack, Helen Mary
dc.contributor.authorKirton, Peter George
dc.contributor.authorStace, Thomas
dc.contributor.authorEastham, Paul
dc.contributor.authorKeeling, Jonathan Mark James
dc.contributor.authorLovett, Brendon William
dc.date.accessioned2018-01-23T13:30:05Z
dc.date.available2018-01-23T13:30:05Z
dc.date.issued2018-02
dc.identifier252108600
dc.identifier212d2a78-5b11-47c8-a684-f17c2343d4b5
dc.identifier85042066412
dc.identifier000424055400002
dc.identifier.citationCammack , H M , Kirton , P G , Stace , T , Eastham , P , Keeling , J M J & Lovett , B W 2018 , ' Coherence protection in coupled quantum systems ' , Physical Review. A, Atomic, molecular, and optical physics , vol. 97 , no. 2 , 022103 . https://doi.org/10.1103/PhysRevA.97.022103en
dc.identifier.issn1050-2947
dc.identifier.otherORCID: /0000-0002-4283-552X/work/41304420
dc.identifier.otherORCID: /0000-0001-5142-9585/work/47136546
dc.identifier.urihttps://hdl.handle.net/10023/12588
dc.descriptionHMC acknowledges studentship funding from EPSRC under grant no. EP/G03673X/1. PGK acknowledges support from EPSRC (EP/M010910/1). BWL acknowledges support from EPSRC (EP/K025562/1). PRE acknowledges funding from SFI (15/IACA/3402). JK acknowledges financial support from EPSRC programs “TOPNES” (EP/I031014/1) and “Hybrid-Polaritonics” (EP/M025330/1).en
dc.description.abstractThe interaction of a quantum system with its environment causes decoherence, setting a fundamental limit on its suitability for quantum information processing. However, we show that if the system consists of coupled parts with different internal energy scales then the interaction of one part with a thermal bath need not lead to loss of coherence from the other. Remarkably, we find that the protected part can remain coherent for longer when the coupling to the bath becomes stronger or the temperature is raised. Our theory will enable the design of decoherence-resistant hybrid quantum computers.
dc.format.extent7
dc.format.extent497613
dc.language.isoeng
dc.relation.ispartofPhysical Review. A, Atomic, molecular, and optical physicsen
dc.rightsCopyright © 2018, American Physical Society. This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://doi.org/10.1103/PhysRevA.97.022103en
dc.subjectQA75 Electronic computers. Computer scienceen
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.subjectDASen
dc.subject.lccQA75en
dc.subject.lccQCen
dc.subject.lccTKen
dc.titleCoherence protection in coupled quantum systemsen
dc.typeJournal articleen
dc.contributor.sponsorEPSRCen
dc.contributor.sponsorEPSRCen
dc.contributor.sponsorEPSRCen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.Condensed Matter Physicsen
dc.identifier.doi10.1103/PhysRevA.97.022103
dc.description.statusPeer revieweden
dc.identifier.grantnumberEP/M010910/1en
dc.identifier.grantnumberEP/I031014/1en
dc.identifier.grantnumberEP/M025330/1en


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