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A: Fachverband Atomphysik
A 28: Poster Session - Atomic Physics IV
A 28.17: Poster
Donnerstag, 12. März 2020, 16:00–18:00, Empore Lichthof
Engineering time-dependent disorder potentials for fermionic quantum gases — •Silvia Hiebel1, Benjamin Nagler1,2, Jennifer Koch1, Sian Barbosa1, and Artur Widera1,2 — 1Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, 67663 Kaiserslautern, Germany
While ultracold atomic gases in static random potentials have facilitated the investigation of Anderson and many-body localization, the impact of time-dependent disorder onto quantum systems is yet a new and uncharted territory.
We have developed a scheme to produce time-dependent optical speckle disorder by combining a stationary with a rotating diffuser. The diffusers are illuminated by a beam of coherent light, onto which they imprint a spatially and temporally varying phase. Subsequently, the light is focused onto the position of the atoms, which experience a dynamic speckle potential. The characteristic time scale of the dynamics is given by the rotation speed of the diffusor and, thus, can be tuned in broad range of parameters to match typical time scales of the quantum gas.
Here we present a characterization of the speckle pattern together with a characterization of the quantum gas in order to identify optimum parameters for the investigation of nonequilibrium physics in interacting quantum gases.