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Disorder-assisted quantum transport in suboptimal decoherence regimes
We investigate quantum transport in binary tree structures and in hypercubes for the disordered Frenkel-exciton Hamiltonian under pure dephasing noise. We compute the energy transport efficiency as a function of disorder and dephasing rates. We demonstrate that dephasing improves transport efficienc...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4698721/ https://www.ncbi.nlm.nih.gov/pubmed/26726133 http://dx.doi.org/10.1038/srep18142 |
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author | Novo, Leonardo Mohseni, Masoud Omar, Yasser |
author_facet | Novo, Leonardo Mohseni, Masoud Omar, Yasser |
author_sort | Novo, Leonardo |
collection | PubMed |
description | We investigate quantum transport in binary tree structures and in hypercubes for the disordered Frenkel-exciton Hamiltonian under pure dephasing noise. We compute the energy transport efficiency as a function of disorder and dephasing rates. We demonstrate that dephasing improves transport efficiency not only in the disordered case, but also in the ordered one. The maximal transport efficiency is obtained when the dephasing timescale matches the hopping timescale, which represent new examples of the Goldilocks principle at the quantum scale. Remarkably, we find that in weak dephasing regimes, away from optimal levels of environmental fluctuations, the average effect of increasing disorder is to improve the transport efficiency until an optimal value for disorder is reached. Our results suggest that rational design of the site energies statistical distributions could lead to better performances in transport systems at nanoscale when their natural environments are far from the optimal dephasing regime. |
format | Online Article Text |
id | pubmed-4698721 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-46987212016-01-13 Disorder-assisted quantum transport in suboptimal decoherence regimes Novo, Leonardo Mohseni, Masoud Omar, Yasser Sci Rep Article We investigate quantum transport in binary tree structures and in hypercubes for the disordered Frenkel-exciton Hamiltonian under pure dephasing noise. We compute the energy transport efficiency as a function of disorder and dephasing rates. We demonstrate that dephasing improves transport efficiency not only in the disordered case, but also in the ordered one. The maximal transport efficiency is obtained when the dephasing timescale matches the hopping timescale, which represent new examples of the Goldilocks principle at the quantum scale. Remarkably, we find that in weak dephasing regimes, away from optimal levels of environmental fluctuations, the average effect of increasing disorder is to improve the transport efficiency until an optimal value for disorder is reached. Our results suggest that rational design of the site energies statistical distributions could lead to better performances in transport systems at nanoscale when their natural environments are far from the optimal dephasing regime. Nature Publishing Group 2016-01-04 /pmc/articles/PMC4698721/ /pubmed/26726133 http://dx.doi.org/10.1038/srep18142 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Novo, Leonardo Mohseni, Masoud Omar, Yasser Disorder-assisted quantum transport in suboptimal decoherence regimes |
title | Disorder-assisted quantum transport in suboptimal decoherence regimes |
title_full | Disorder-assisted quantum transport in suboptimal decoherence regimes |
title_fullStr | Disorder-assisted quantum transport in suboptimal decoherence regimes |
title_full_unstemmed | Disorder-assisted quantum transport in suboptimal decoherence regimes |
title_short | Disorder-assisted quantum transport in suboptimal decoherence regimes |
title_sort | disorder-assisted quantum transport in suboptimal decoherence regimes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4698721/ https://www.ncbi.nlm.nih.gov/pubmed/26726133 http://dx.doi.org/10.1038/srep18142 |
work_keys_str_mv | AT novoleonardo disorderassistedquantumtransportinsuboptimaldecoherenceregimes AT mohsenimasoud disorderassistedquantumtransportinsuboptimaldecoherenceregimes AT omaryasser disorderassistedquantumtransportinsuboptimaldecoherenceregimes |