A multi-site variational master equation approach to dissipative energy transfer

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Unitary transformations can allow one to study open quantum systems in situations for which standard, weak-coupling type approximations are not valid. We develop here an extension of the variational (polaron) transformation approach to open system dynamics, which applies to arbitrarily large exciton...

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Autores principales:	Pollock, F.A., McCutcheon, D.P.S., Lovett, B.W., Gauger, E.M., Nazir, A.
Formato:	Artículo publishedVersion
Publicado:	2013
Materias:	Dissipative energy Dynamical behaviours Exciton transport Incoherent process Local environments Open quantum systems Unitary transformations Variational methods Energy dissipation Polarons Quantum electronics Quantum optics Systems analysis
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_13672630_v15_n_p_Pollock https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_13672630_v15_n_p_Pollock_oai
Aporte de:	Repositorio Digital de la Universidad de Buenos Aires (UBA) de Universidad de Buenos Aires

id	I28-R145-paper_13672630_v15_n_p_Pollock_oai
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spelling	I28-R145-paper_13672630_v15_n_p_Pollock_oai2024-08-16 Pollock, F.A. McCutcheon, D.P.S. Lovett, B.W. Gauger, E.M. Nazir, A. 2013 Unitary transformations can allow one to study open quantum systems in situations for which standard, weak-coupling type approximations are not valid. We develop here an extension of the variational (polaron) transformation approach to open system dynamics, which applies to arbitrarily large exciton transport networks with local environments. After deriving a time-local master equation in the transformed frame, we go on to compare the population dynamics predicted using our technique with other established master equations. The variational frame dynamics are found to agree with both weak coupling and full polaron master equations in their respective regions of validity. In parameter regimes considered difficult for these methods, the dynamics predicted by our technique are found to interpolate between the two. The variational method thus gives insight, across a broad range of parameters, into the competition between coherent and incoherent processes in determining the dynamical behaviour of energy transfer networks. © IOP Publishing and Deutsche Physikalische Gesellschaft. application/pdf http://hdl.handle.net/20.500.12110/paper_13672630_v15_n_p_Pollock info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar New J. Phys. 2013;15 Dissipative energy Dynamical behaviours Exciton transport Incoherent process Local environments Open quantum systems Unitary transformations Variational methods Energy dissipation Polarons Quantum electronics Quantum optics Systems analysis A multi-site variational master equation approach to dissipative energy transfer info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_13672630_v15_n_p_Pollock_oai
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-145
collection	Repositorio Digital de la Universidad de Buenos Aires (UBA)
topic	Dissipative energy Dynamical behaviours Exciton transport Incoherent process Local environments Open quantum systems Unitary transformations Variational methods Energy dissipation Polarons Quantum electronics Quantum optics Systems analysis
spellingShingle	Dissipative energy Dynamical behaviours Exciton transport Incoherent process Local environments Open quantum systems Unitary transformations Variational methods Energy dissipation Polarons Quantum electronics Quantum optics Systems analysis Pollock, F.A. McCutcheon, D.P.S. Lovett, B.W. Gauger, E.M. Nazir, A. A multi-site variational master equation approach to dissipative energy transfer
topic_facet	Dissipative energy Dynamical behaviours Exciton transport Incoherent process Local environments Open quantum systems Unitary transformations Variational methods Energy dissipation Polarons Quantum electronics Quantum optics Systems analysis
description	Unitary transformations can allow one to study open quantum systems in situations for which standard, weak-coupling type approximations are not valid. We develop here an extension of the variational (polaron) transformation approach to open system dynamics, which applies to arbitrarily large exciton transport networks with local environments. After deriving a time-local master equation in the transformed frame, we go on to compare the population dynamics predicted using our technique with other established master equations. The variational frame dynamics are found to agree with both weak coupling and full polaron master equations in their respective regions of validity. In parameter regimes considered difficult for these methods, the dynamics predicted by our technique are found to interpolate between the two. The variational method thus gives insight, across a broad range of parameters, into the competition between coherent and incoherent processes in determining the dynamical behaviour of energy transfer networks. © IOP Publishing and Deutsche Physikalische Gesellschaft.
format	Artículo Artículo publishedVersion
author	Pollock, F.A. McCutcheon, D.P.S. Lovett, B.W. Gauger, E.M. Nazir, A.
author_facet	Pollock, F.A. McCutcheon, D.P.S. Lovett, B.W. Gauger, E.M. Nazir, A.
author_sort	Pollock, F.A.
title	A multi-site variational master equation approach to dissipative energy transfer
title_short	A multi-site variational master equation approach to dissipative energy transfer
title_full	A multi-site variational master equation approach to dissipative energy transfer
title_fullStr	A multi-site variational master equation approach to dissipative energy transfer
title_full_unstemmed	A multi-site variational master equation approach to dissipative energy transfer
title_sort	multi-site variational master equation approach to dissipative energy transfer
publishDate	2013
url	http://hdl.handle.net/20.500.12110/paper_13672630_v15_n_p_Pollock https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_13672630_v15_n_p_Pollock_oai
work_keys_str_mv	AT pollockfa amultisitevariationalmasterequationapproachtodissipativeenergytransfer AT mccutcheondps amultisitevariationalmasterequationapproachtodissipativeenergytransfer AT lovettbw amultisitevariationalmasterequationapproachtodissipativeenergytransfer AT gaugerem amultisitevariationalmasterequationapproachtodissipativeenergytransfer AT nazira amultisitevariationalmasterequationapproachtodissipativeenergytransfer AT pollockfa multisitevariationalmasterequationapproachtodissipativeenergytransfer AT mccutcheondps multisitevariationalmasterequationapproachtodissipativeenergytransfer AT lovettbw multisitevariationalmasterequationapproachtodissipativeenergytransfer AT gaugerem multisitevariationalmasterequationapproachtodissipativeenergytransfer AT nazira multisitevariationalmasterequationapproachtodissipativeenergytransfer
_version_	1809357115989426176

A multi-site variational master equation approach to dissipative energy transfer

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