Non-classicality of the molecular vibrations activating electronic dynamics at room temperature

24 06/2013

Monday, 24 Jun. 2013, 17:30 - 18:30

Presenter: Alexandra Olaya-Castro - University College London
Host: CoQoS
Where: Lecture hall, Atominstitut Stadionallee 2, 1020 Wien

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 a 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 [1].

[1] Edward J. O'Reilly, Alexandra Olaya-Castro, E-print: arXiv:1301.6970