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DY: Dynamik und Statistische Physik
DY 46: Poster
DY 46.60: Poster
Donnerstag, 30. März 2006, 16:00–18:00, P1
Two particles with bistable coupling on a ratchet — •Jörg Menche1,2 and Lutz Schimansky-Geier1 — 1Humboldt Universität zu Berlin — 2Universität Leipzig
We study the motion of two Brownian particles coupled by a bistable potential on a periodically rocked ratchet. Bistable coupling symmetrizes the two particles and admits a richer dynamics that cannot be found with linear coupling or a single particle. Depending on the coupling strength and the equilibrium distance we find different step patterns and current reversals. We present numerical results and compare them with analytical solutions in limiting cases of adiabatically slow rocking and of rigid coupling.