Edward J. O'Reilly, Alexandra Olaya-Castro
Advancing the debate on the possible advantages of quantum effects in biomolecular systems requires illustrations of biomolecular prototypes that can exhibit and use non-classical phenomena to aid performance. Here we investigate non-classical fluctuations in molecular dimers present in photosynthetic light-harvesting antennae. We show that exciton-vibrational resonances enable non-classical occupation fluctuations of the driven collective high-energy vibration at room temperature. This phenomenon is a manifestation of strong modulation of low-phonon occupation levels through the transient formation of hybrid exciton-vibration states. For the prototype considered, direct quantitative relations seem to hold between non-classicality and optimal exciton population transfer.
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http://arxiv.org/abs/1301.6970
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