Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 32: Ultra-cold atoms, ions and BEC VI (with Q)

A 32.3: Vortrag

Donnerstag, 21. März 2013, 11:30–11:45, B 305

Evaporative cooling and thermalization in one-dimensional Bose gases — •Bernhard Rauer, Tim Langen, Michael Gring, Max Kuhnert, David Adu Smith, Remi Geiger, and Jörg Schmiedmayer — Vienna Center for Quantum Science and Technology, Atominstitut, Technische Universität (TU) Wien, Stadionallee 2, 1020 Vienna, Austria.

We experimentally study the process of evaporative cooling for a one-dimensional (1D) Bose gas in the quasi-condensate regime. While this process is well understood for 3D systems, evaporative cooling in 1D is strongly affected by the discrete level structure of the trap and the strongly inhibited thermalization. Consequently, the exact mechanism is still the subject of theoretical debate. The problem is closely related to our ongoing effort to understand relaxation and thermalization in a 1D quantum gases. The current status of this investigation will be presented.