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Quantum dynamics in a tiered non-Markovian environment
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dc.contributor.author | Fruchtman, A. | |
dc.contributor.author | Lovett, B.W. | |
dc.contributor.author | Benjamin, S.C. | |
dc.contributor.author | Gauger, E.M. | |
dc.date.accessioned | 2015-03-26T10:31:02Z | |
dc.date.available | 2015-03-26T10:31:02Z | |
dc.date.issued | 2015-02-24 | |
dc.identifier.citation | Fruchtman , A , Lovett , B W , Benjamin , S C & Gauger , E M 2015 , ' Quantum dynamics in a tiered non-Markovian environment ' , New Journal of Physics , vol. 17 . https://doi.org/10.1088/1367-2630/17/2/023063 | en |
dc.identifier.issn | 1367-2630 | |
dc.identifier.other | PURE: 176909765 | |
dc.identifier.other | PURE UUID: fe1de9a6-1e32-496c-97e8-7cb35a88525c | |
dc.identifier.other | Scopus: 84924240140 | |
dc.identifier.other | ORCID: /0000-0001-5142-9585/work/47136590 | |
dc.identifier.other | WOS: 000352867100001 | |
dc.identifier.uri | https://hdl.handle.net/10023/6340 | |
dc.description | This work was supported by the Leverhulme Trust, EPSRC under platform grant EP/J015067/1, and the National Research Foundation and Ministry of Education, Singapore. BWL thanks the Royal Society for a University Research Fellowship. EMG acknowledges support from the RSE/Scottish Government. | en |
dc.description.abstract | We introduce a new analytical method for studying the open quantum systems problem of a discrete system weakly coupled to an environment of harmonic oscillators. Our approach is based on a phase space representation of the density matrix for a system coupled to a two-tiered environment. The dynamics of the system and its immediate environment are resolved in a non-Markovian way, and the environmental modes of the inner environment can themselves be damped by a wider 'universe'. Applying our approach to the canonical cases of the Rabi and spin-boson models we obtain new analytical expressions for an effective thermalization temperature and corrections to the environmental response functions as direct consequences of considering such a tiered environment. A comparison with exact numerical simulations confirms that our approximate expressions are remarkably accurate, while their analytic nature offers the prospect of deeper understanding of the physics which they describe. A unique advantage of our method is that it permits the simultaneous inclusion of a continuous bath as well as discrete environmental modes, leading to wide and versatile applicability. | |
dc.language.iso | eng | |
dc.relation.ispartof | New Journal of Physics | en |
dc.rights | © 2015 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence (http://creativecommons.org/licenses/by/3.0/). 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.subject | QC Physics | en |
dc.subject | NDAS | en |
dc.subject.lcc | QC | en |
dc.title | Quantum dynamics in a tiered non-Markovian environment | en |
dc.type | Journal article | en |
dc.description.version | Publisher PDF | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. Condensed Matter Physics | en |
dc.identifier.doi | https://doi.org/10.1088/1367-2630/17/2/023063 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | http://bcove.me/ee4ltn47 | en |
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