Regensburg 2007 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 16: Brownian motion and transport I

DY 16.8: Vortrag

Dienstag, 27. März 2007, 16:15–16:30, H3

Josephson vortex ratchet: experiment and simulations — •Edward Goldobin, Markus Beck, Reinhold Kleiner, and Dieter Koelle — Physikalisches Institut – Experimentalphysik II, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany

We investigate a Josephson vortex ratchet — a fluxon in an asymmetric periodic potential driven by a deterministic force with zero time average. Our recent experiments[1] show that the average velocity of the ac driven fluxon may reach 91% of the Swihart velocity. In this talk we describe our experiment and give some further insights on the fluxon dynamics in such a ratchet, obtained by numerical simulations. [1] Phys. Rev. Lett. 95, 090603 (2005).