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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie

Q 57.26: Poster

Thursday, March 17, 2011, 16:30–19:30, P1

Quantum fluctuations in the time-dependent BCS-BEC crossover — •Bernhard M. Breid and James R. Anglin — Technische Universität Kaiserslautern, Germany

We report our theoretical results on various aspects connected with the time-dependent formation of a molecular BEC out of an atomic BCS state by a slow Feshbach sweep at zero temperature. In order to solve for the systems dynamics, we apply a path integral approach using adiabatic approximations to solve for an effective action for the molecules. We are then in a position to address questions like the non-adiabatic production of quasi-particles during the sweep and the effect of different sweep rates.