The Fleming group has reported a quantum theory for ratcheted exciton transfer in molecules. Quantum ratchets hold the promise of providing non-thermal routes to achieving population transport in systems where excitation transport between molecules is otherwise energetically unfavorable.
P Bhattacharyya and GR Fleming, “Quantum Ratcheted Photophysics in Energy Transport”, J. Phys. Chem. Lett. 11, 8337–8345 (2020) https://doi.org/10.1021/acs.jpclett.0c02351
