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DY: Fachverband Dynamik und Statistische Physik

DY 6: Poster Session I

DY 6.44: Poster

Montag, 22. März 2010, 16:00–18:00, Poster B2

Dephasing in networks with traps: from Quantum to Random Walk — •Tobias Schmid, Oliver Mülken, and Alexander Blumen — Albert-Ludwig Universität Freiburg, Physikalisches Institut

Earlier works have demonstrated the transfer of excitons on networks from initial sites to traps due to classical random motion in contrast to quantum motion. By utilising the Liouville-von-Neumann (LvN) equation approach, a simple dephasing via Lindblad operators in the quantum case is introduced. The transition between random and quantum motion depending on the coupling strength to the bath is observed for different networks. The limiting cases of coherent motion for weak coupling and as well as the Zeno limit for strong coupling are demonstrated.