Enhancement of coherent energy transport by disorder and temperature in light harvesting processes

We investigate the influence of static disorder and thermal excitations on excitonic energy transport in the light-harvesting apparatus of photosynthetic systems by solving the Schrödinger equation and taking into account the coherent hoppings of excitons, the rates of exciton creation and annihilat...

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Main Authors: Xiong, Shi-Jie, Xiong, Ye, Zhao, Yang
Other Authors: School of Materials Science & Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/95039
http://hdl.handle.net/10220/9400
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-950392023-07-14T15:57:50Z Enhancement of coherent energy transport by disorder and temperature in light harvesting processes Xiong, Shi-Jie Xiong, Ye Zhao, Yang School of Materials Science & Engineering We investigate the influence of static disorder and thermal excitations on excitonic energy transport in the light-harvesting apparatus of photosynthetic systems by solving the Schrödinger equation and taking into account the coherent hoppings of excitons, the rates of exciton creation and annihilation in antennas and reaction centers, and the coupling to thermally excited phonons. The antennas and reaction centers are modeled, respectively, as the sources and drains which provide the channels for creation and annihilation of excitons. Phonon modes below a maximum frequency are coupled to the excitons that are continuously created in the antennas and depleted in the reaction centers, and the phonon population in these modes obeys the Bose-Einstein distribution at a given temperature. It is found that the energy transport is not only robust against the static disorder and the thermal noise, but it can also be enhanced by increasing the randomness and temperature in most parameter regimes. Relevance of our work to the highly efficient energy transport in photosynthetic systems is discussed. Published version 2013-03-13T08:31:55Z 2019-12-06T19:07:03Z 2013-03-13T08:31:55Z 2019-12-06T19:07:03Z 2012 2012 Journal Article Xiong, S. J., Xiong, Y., & Zhao, Y. (2012). Enhancement of coherent energy transport by disorder and temperature in light harvesting processes. The Journal of Chemical Physics, 137(9). 0021-9606 https://hdl.handle.net/10356/95039 http://hdl.handle.net/10220/9400 10.1063/1.4748571 en The journal of chemical physics © 2012 American Institute of Physics. This paper was published in The Journal of Chemical Physics and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4748571]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
description We investigate the influence of static disorder and thermal excitations on excitonic energy transport in the light-harvesting apparatus of photosynthetic systems by solving the Schrödinger equation and taking into account the coherent hoppings of excitons, the rates of exciton creation and annihilation in antennas and reaction centers, and the coupling to thermally excited phonons. The antennas and reaction centers are modeled, respectively, as the sources and drains which provide the channels for creation and annihilation of excitons. Phonon modes below a maximum frequency are coupled to the excitons that are continuously created in the antennas and depleted in the reaction centers, and the phonon population in these modes obeys the Bose-Einstein distribution at a given temperature. It is found that the energy transport is not only robust against the static disorder and the thermal noise, but it can also be enhanced by increasing the randomness and temperature in most parameter regimes. Relevance of our work to the highly efficient energy transport in photosynthetic systems is discussed.
author2 School of Materials Science & Engineering
author_facet School of Materials Science & Engineering
Xiong, Shi-Jie
Xiong, Ye
Zhao, Yang
format Article
author Xiong, Shi-Jie
Xiong, Ye
Zhao, Yang
spellingShingle Xiong, Shi-Jie
Xiong, Ye
Zhao, Yang
Enhancement of coherent energy transport by disorder and temperature in light harvesting processes
author_sort Xiong, Shi-Jie
title Enhancement of coherent energy transport by disorder and temperature in light harvesting processes
title_short Enhancement of coherent energy transport by disorder and temperature in light harvesting processes
title_full Enhancement of coherent energy transport by disorder and temperature in light harvesting processes
title_fullStr Enhancement of coherent energy transport by disorder and temperature in light harvesting processes
title_full_unstemmed Enhancement of coherent energy transport by disorder and temperature in light harvesting processes
title_sort enhancement of coherent energy transport by disorder and temperature in light harvesting processes
publishDate 2013
url https://hdl.handle.net/10356/95039
http://hdl.handle.net/10220/9400
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