Environment-assisted quantum transport in ordered systems

Kassal, Ivan and Aspuru-Guzik, Alán (2012) Environment-assisted quantum transport in ordered systems. New Journal of Physics, 14 053041.1-053041.12. doi:10.1088/1367-2630/14/5/053041

Author Kassal, Ivan
Aspuru-Guzik, Alán
Title Environment-assisted quantum transport in ordered systems
Journal name New Journal of Physics   Check publisher's open access policy
ISSN 1367-2630
Publication date 2012-05-01
Year available 2012
Sub-type Article (original research)
DOI 10.1088/1367-2630/14/5/053041
Open Access Status DOI
Volume 14
Start page 053041.1
End page 053041.12
Total pages 12
Place of publication Bristol, United Kingdom
Publisher Institute of Physics
Language eng
Abstract Noise-assisted transport in quantum systems occurs when quantum time evolution and decoherence conspire to produce a transport efficiency that is higher than what would be seen in either the purely quantum or purely classical cases. In disordered systems, it has been understood as the suppression of coherent quantum localization through noise, which brings detuned quantum levels into resonance and thus facilitates transport. We report several new mechanisms of environment-assisted transport in ordered systems, in which there is no localization to overcome and where one would naively expect that coherent transport is the fastest possible. Although we are particularly motivated by the need to understand excitonic energy transfer in photosynthetic light-harvesting complexes, our model is general-transport in a tight-binding system with dephasing, a source and a trap-and can be expected to have wider application.
Keyword Energy-transfer
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID N66001-10-1-4063
Institutional Status UQ
Additional Notes Article Number 053041 Published: 29 May 2012.

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2013 Collection
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