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dc.contributor.authorMatern, Stephanie
dc.contributor.authorLoss, Daniel
dc.contributor.authorKlinovaja, Jelena
dc.contributor.authorBraunecker, Bernd
dc.identifier.citationMatern , S , Loss , D , Klinovaja , J & Braunecker , B 2019 , ' Coherent backaction between spins and an electronic bath : non-Markovian dynamics and low-temperature quantum thermodynamic electron cooling ' , Physical Review. B, Condensed matter and materials physics , vol. 100 , no. 13 , 134308 .
dc.identifier.otherPURE: 261446051
dc.identifier.otherPURE UUID: 689a827d-abfe-44a9-90d5-de7251ba6bc1
dc.identifier.otherORCID: /0000-0002-7077-8825/work/63380975
dc.identifier.otherScopus: 85074389160
dc.identifier.otherWOS: 000490466200001
dc.descriptionS.M. acknowledges the support by the EPSRC under Grant No. EP/L015110/1. D.L. and J.K. acknowledge the support by the Swiss National Science Foundation and NCCR QSIT.en
dc.description.abstractWe provide a versatile analytical framework for calculating the dynamics of a spin system in contact with a fermionic bath beyond the Markov approximation. The approach is based on a second-order expansion of the Nakajima-Zwanzig master equation but systematically includes all quantum coherent memory effects leading to non-Markovian dynamics. Our results describe, for the free induction decay, the full time range from the non-Markovian dynamics at short times, to the well-known exponential thermal decay at long times. We provide full analytic results for the entire time range using a bath of itinerant electrons as an archetype for universal quantum fluctuations. Furthermore, we propose a quantum thermodynamic scheme to employ the temperature insensitivity of the non-Markovian decay to transport heat out of the electron system and thus, by repeated reinitialization of a cluster of spins, to efficiently cool the electrons at very low temperatures.
dc.relation.ispartofPhysical Review. B, Condensed matter and materials physicsen
dc.rightsCopyright © 2019 American Physical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at
dc.subjectQC Physicsen
dc.titleCoherent backaction between spins and an electronic bath : non-Markovian dynamics and low-temperature quantum thermodynamic electron coolingen
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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