Hamburg 2009 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 56: Poster IV
Q 56.31: Poster
Thursday, March 5, 2009, 16:30–19:00, VMP 9 Poster
A Two-Dimensional Hamiltonian Ratchet — •Sarah Kajari-Schröder1, Eric Lutz2, and Wolfgang P. Schleich1 — 1Institut für Quantenphysik, Universität Ulm, D-89069, Germany — 2Institut für Physik, Universität Augsburg, D-86135, Germany
The ratchet effect is the generation of directed transport in the absence of any biased forces. We present a general example of a two-dimensional time-independent Hamiltonian system describing a charged particle in an external potential and a magnetic field. We show that this system can exhibit chaotic ratchet currents whose magnitude and direction can be controlled by properly selecting the parameters of the Hamiltonian.