Dresden 2011 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 15: ISPS Intersectional Poster Session

DY 15.20: Poster

Tuesday, March 15, 2011, 18:00–20:00, P1

Directed excitation transfer in non-equilibrium networks — •Maximilian Bauer and Oliver Mülken — Physikalisches Institut, Albert-Ludwigs Universität Freiburg, Freiburg, Germany

In the framework of continuous-time quantum walks (CTQW), the coherent dynamics of excitations is usually studied on static networks. We consider a CTQW on a dynamically varying structure, namely a vibrating chain. By applying an external field and matching the field strength with the oscillation frequency of the chain it is possible to obtain an (average) transport of an initial Gaussian wave packet. We distinguish between a uniform oscillation of all nodes of the chain and the chain being in its lowest eigenmode. Both cases can lead to directed transport. Furthermore, the coupling of these systems to an environment by Lindblad operators and the generalization to interacting particles is investigated.

Reference: [1] O. Mülken and M. Bauer, submitted (2010)