Quantum transport in a 1D tight-binding model with local and non-local coupling to an explicit environment
Iubini, S. I.
; Kerans, O.
; Piazza, F.
Quantum transport in a 1D tight-binding model with local and non-local coupling to an explicit environment, Proc Workshop on Quantum Effects in Biological Systems - QuEBS, Florence, Italy, Vol. N/A, pp. N/A - N/A, July, 2015.
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We simulate a model for exciton energy transport on a one-dimensional lattice in an open quantum system setting at finite temperature. Using the approach we present here, it is possible to simulate time evolution for long times and in large chains because only the exciton is treated quantum-mechanically while the beads are treated classically. We characterize energy transport via two figures of merit, namely the diffusion constant of the exciton spreading and the transport efficiency. We find non-monotonic behaviour for both figures of merit as a function of temperature, which we interpret as a phonon-assisted effect controlled by the exciton-lattice coupling.