Creating and sharing knowledge for telecommunications

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. ; Omar, Y.

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.

Digital Object Identifier: 0

Abstract
We simulate a model for exciton energy transport on a one-dimensional lattice in an open quantum system setting at fi nite 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 fi gures of merit, namely the diff usion constant of the exciton spreading and the transport efficiency. We fi nd non-monotonic behaviour for both fi gures of merit as a function of temperature, which we interpret as a phonon-assisted e ffect controlled by the exciton-lattice coupling.