Berlin 2005 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 21: Poster Quanteneffekte

Q 21.10: Poster

Montag, 7. März 2005, 11:00–12:30, Poster HU

Hamiltonian Ratchets using Optical Lattices — •Sarah Schröder¹, Eric Lutz¹, Ferruccio Renzoni², and Wolfgang P. Schleich¹ — ¹Abteilung für Quantenphysik, Universität Ulm, Germany — ²Department of Physics and Astronomy, University College London, United Kingdom

Thermal ratchets show a directed current due to rectification of noise. In some systems chaotic dynamics can mimic the effects of thermal fluctuations. Here we investigate the experimental realisation of a chaotic Hamiltonian ratchet in a two-dimensional optical lattice and analyse the mechanism leading to a directed current in this deterministic system.