Decoherence in photosynthetic energy transfer : based on a spin bath model

Decoherence in photosynthetic energy transfer : based on a spin bath model

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In this thesis we study the coherent energy transfer in photosynthetic systems. This resonant energy transfer has proven to be a coherent transfer in some light harvest complexes. The model which we suggest to describe this mechanism is an exciton hopping on an N-site ring coupled to a spin bath. An...

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Main Author: Zhu, Zhen
Format: Others
Language:English
Published: University of British Columbia 2009
Online Access:http://hdl.handle.net/2429/13854
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spelling ndltd-UBC-oai-circle.library.ubc.ca-2429-138542018-01-05T17:23:49Z Decoherence in photosynthetic energy transfer : based on a spin bath model Zhu, Zhen In this thesis we study the coherent energy transfer in photosynthetic systems. This resonant energy transfer has proven to be a coherent transfer in some light harvest complexes. The model which we suggest to describe this mechanism is an exciton hopping on an N-site ring coupled to a spin bath. Analytic results are found for both the dynamics of the influence functional and of the reduced density matrix of the excitons.We also give results for the dynamics of the current as a function of time. By setting states splitting initially into 2 separate wave-packets moving at different velocities, we reproduce the coherent beating phenomenon in experiments. Science, Faculty of Physics and Astronomy, Department of Graduate 2009-10-09T21:29:52Z 2009-10-09T21:29:52Z 2009 2009-11 Text Thesis/Dissertation http://hdl.handle.net/2429/13854 eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ 2477976 bytes application/pdf University of British Columbia
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language English
format Others
sources NDLTD
description In this thesis we study the coherent energy transfer in photosynthetic systems. This resonant energy transfer has proven to be a coherent transfer in some light harvest complexes. The model which we suggest to describe this mechanism is an exciton hopping on an N-site ring coupled to a spin bath. Analytic results are found for both the dynamics of the influence functional and of the reduced density matrix of the excitons.We also give results for the dynamics of the current as a function of time. By setting states splitting initially into 2 separate wave-packets moving at different velocities, we reproduce the coherent beating phenomenon in experiments. === Science, Faculty of === Physics and Astronomy, Department of === Graduate
author Zhu, Zhen
spellingShingle Zhu, Zhen
Decoherence in photosynthetic energy transfer : based on a spin bath model
author_facet Zhu, Zhen
author_sort Zhu, Zhen
title Decoherence in photosynthetic energy transfer : based on a spin bath model
title_short Decoherence in photosynthetic energy transfer : based on a spin bath model
title_full Decoherence in photosynthetic energy transfer : based on a spin bath model
title_fullStr Decoherence in photosynthetic energy transfer : based on a spin bath model
title_full_unstemmed Decoherence in photosynthetic energy transfer : based on a spin bath model
title_sort decoherence in photosynthetic energy transfer : based on a spin bath model
publisher University of British Columbia
publishDate 2009
url http://hdl.handle.net/2429/13854
work_keys_str_mv AT zhuzhen decoherenceinphotosyntheticenergytransferbasedonaspinbathmodel
_version_ 1718582225038999552

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