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dc.contributor.authorChiu, Yiu-Fung
dc.contributor.authorStrathearn, Aidan
dc.contributor.authorKeeling, Jonathan
dc.date.accessioned2022-06-28T16:30:07Z
dc.date.available2022-06-28T16:30:07Z
dc.date.issued2022-07-06
dc.identifier280067518
dc.identifierb4e17be9-5e67-4b9d-9e1e-3648a1b44be0
dc.identifier85134481596
dc.identifier000824587200012
dc.identifier.citationChiu , Y-F , Strathearn , A & Keeling , J 2022 , ' Numerical evaluation and robustness of the quantum mean force Gibbs state ' , Physical Review. A, Atomic, molecular, and optical physics , vol. 106 , no. 1 , 012204 . https://doi.org/10.1103/PhysRevA.106.012204en
dc.identifier.issn1050-2947
dc.identifier.otherArXiv: http://arxiv.org/abs/2112.08254v1
dc.identifier.otherORCID: /0000-0002-4283-552X/work/115631105
dc.identifier.urihttps://hdl.handle.net/10023/25575
dc.descriptionFunding: Y.F.C. acknowledges funding from the St Andrews Undergraduate Research Assistant Scheme, the School of Physics and Astronomy Student-Staff Council vacation awards, and the University of St Andrews Physics Trust. J.K. acknowledges funding from EPSRC (EP/T014032/1).en
dc.description.abstractWe introduce a numerical method to determine the Hamiltonian of Mean Force (HMF) Gibbs state for a quantum system strongly coupled to a reservoir. The method adapts the Time Evolving Matrix Product Operator (TEMPO) algorithm to imaginary time propagation. By comparing the real-time and imaginary-time propagation for a generalized spin-boson model, we confirm that the HMF Gibbs state correctly predicts the steady state. We show that the numerical dynamics match the polaron master equation at strong coupling. We illustrate the potential of the imaginary-time TEMPO approach by exploring reservoir-induced entanglement between qubits.
dc.format.extent8
dc.format.extent439027
dc.language.isoeng
dc.relation.ispartofPhysical Review. A, Atomic, molecular, and optical physicsen
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.subjectT-NDASen
dc.subjectNCADen
dc.subject.lccQCen
dc.subject.lccTKen
dc.titleNumerical evaluation and robustness of the quantum mean force Gibbs stateen
dc.typeJournal articleen
dc.contributor.sponsorEPSRCen
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.identifier.doi10.1103/PhysRevA.106.012204
dc.description.statusPeer revieweden
dc.identifier.grantnumberEP/T014032/1en


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