Environment-Assisted Quantum Coherence in Photosynthetic Complex

The Journal of Physical Chemistry Letters
Rajesh Dutta, Biman Bagchi

Abstract

Recent experiments [ Engel et al. Nature, 2007, 446, 782-786 ] revealed the existence of surprisingly long-lived quantum coherence in the noisy biological environment of the photosynthetic Fenna-Matthews-Olson (FMO) complex. Such coherence can clearly play an important role in facilitating efficient energy transfer. The occurrence of quantum coherence in quantum transport is also implicated in excitation transport processes in conjugated polymers [ Collini et al. Science, 2009, 323, 369-373 ]. Even though these systems are strongly correlated, most theoretical studies invoke a Markovian approximation where the temporal correlation of bath fluctuations is neglected. We use an elegant nonperturbative method based on Kubo's quantum stochastic Liouville equation (QSLE) to study the effects of correlated non-Markovian bath fluctuations in several different limits and find the interesting result that fluctuations not only destroy coherence but under appropriate conditions can also facilitate it. We show that temperature has the most pronounced effect in the intermediate coupling limit where it can promote transition from coherent to incoherent transfer.

References

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Nov 3, 2016·The Journal of Chemical Physics·Rajesh Dutta, Biman Bagchi

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Citations

Apr 10, 2021·The Journal of Chemical Physics·Sangita MondalBiman Bagchi
Apr 28, 2020·The Journal of Physical Chemistry. B·Davinder Singh, Shubhrangshu Dasgupta
Sep 11, 2018·The Journal of Physical Chemistry Letters·Margherita MaiuriGregory D Scholes
May 12, 2020·The Journal of Physical Chemistry. B·Rajesh Dutta, Biman Bagchi
Mar 15, 2018·The Journal of Physical Chemistry Letters·Elinor Zerah-Harush, Yonatan Dubi
Jan 9, 2021·The Journal of Physical Chemistry. B·Davinder Singh
Nov 30, 2021·Physical Chemistry Chemical Physics : PCCP·Kwang Hyun Cho, Young Min Rhee

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