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arXiv · 2208.12166

Bichromatic state-dependent disordered potential for Anderson localization of ultracold atoms

Baptiste Lecoutre·Yukun Guo·Xudong Yu·M. Niranjan·Musawwadah Mukhtar·Valentin V. Volchkov·Alain Aspect·Vincent Josse
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Abstract

The ability to load ultracold atoms at a well-defined energy in a disordered potential is a crucial tool to study quantum transport, and in particular Anderson localization. In this paper, we present a new method for achieving that goal by rf transfer of atoms of an atomic Bose-Einstein condensate from a disorder insensitive state to a disorder sensitive state. It is based on a bichromatic laser speckle pattern, produced by two lasers whose frequencies are chosen so that their light-shifts cancel each other in the first state and add-up in the second state. Moreover, the spontaneous scattering rate in the disorder-sensitive state is low enough to allow for long observation times of quantum transport in that state. We theoretically and experimentally study the characteristics of the resulting potential.

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Baptiste Lecoutre, Yukun Guo, Xudong Yu, M. Niranjan, Musawwadah Mukhtar, Valentin V. Volchkov, Alain Aspect, Vincent Josse. 2022-08-25. Bichromatic state-dependent disordered potential for Anderson localization of ultracold atoms. https://doi.org/10.1140/epjd/s10053-022-00549-6

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