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

2022

Article

OS Lab

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 in 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.

@article{bichromdisorder,
  title = {Bichromatic state-dependent disordered potential for Anderson localization of ultracold atoms},
  author = {Lecoutre, Baptiste and Guo, Yukun and Yu, Xudong and Niranjan, M. and Mukhtar, Musawwadah and Volchkov, Valentin and Aspect, Alain and Josse, Vincent},
  journal = {European Physical Journal D},
  volume = {76},
  pages = {218},
  year = {2022},
  doi = {https://doi.org/10.1140/epjd/s10053-022-00549-6}
}