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dc.contributor.authorCoates, Alexandre R
dc.contributor.authorLovett, Brendon W
dc.contributor.authorGauger, Erik M
dc.identifier.citationCoates , A R , Lovett , B W & Gauger , E M 2021 , ' Localisation determines the optimal noise rate for quantum transport ' , New Journal of Physics , vol. 23 , no. 12 , 123014 .
dc.identifier.otherPURE: 277028357
dc.identifier.otherPURE UUID: c714e72e-0fc6-4c54-82dc-87f9547764b2
dc.identifier.otherJisc: dadf611d414a48868ebfb7770747b72d
dc.identifier.otherpublisher-id: njpac3b2c
dc.identifier.othermanuscript: ac3b2c
dc.identifier.otherother: njp-113748.r1
dc.identifier.otherORCID: /0000-0001-5142-9585/work/104619032
dc.identifier.otherWOS: 000728526100001
dc.identifier.otherScopus: 85122534024
dc.descriptionThis work was supported by EPSRC Grant No. EP/L015110/1.en
dc.description.abstractEnvironmental noise plays a key role in determining the efficiency of transport in quantum systems. However, disorder and localisation alter the impact of such noise on energy transport. To provide a deeper understanding of this relationship we perform a systematic study of the connection between eigenstate localisation and the optimal dephasing rate in 1D chains. The effects of energy gradients and disorder on chains of various lengths are evaluated and we demonstrate how optimal transport efficiency is determined by both size-independent, as well as size-dependent factors. By discussing how size-dependent influences emerge from finite size effects we establish when these effects are suppressed, and show that a simple power law captures the interplay between size-dependent and size-independent responses. Moving beyond phenomenological pure dephasing, we implement a finite temperature Bloch–Redfield model that captures detailed balance. We show that the relationship between localisation and optimal environmental coupling strength continues to apply at intermediate and high temperature but breaks down in the low temperature limit.
dc.relation.ispartofNew Journal of Physicsen
dc.rightsCopyright © 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.en
dc.subjectNoise-assisted quantum transporten
dc.subjectOpen quantum systemsen
dc.subjectQuantum transporten
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleLocalisation determines the optimal noise rate for quantum transporten
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.Centre for Designer Quantum Materialsen
dc.contributor.institutionUniversity of St Andrews.Condensed Matter Physicsen
dc.description.statusPeer revieweden

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