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Measurement of Spectral Functions of Ultracold Atoms in Disordered Potentials




We report on the measurement of the spectral functions of noninteracting ultracold atoms in a three-dimensional disordered potential resulting from an optical speckle field. Varying the disorder strength by 2 orders of magnitude, we observe the crossover from the “quantum” perturbative regime of low disorder to the “classical” regime at higher disorder strength, and find an excellent agreement with numerical simulations. The method relies on the use of state-dependent disorder and the controlled transfer of atoms to create well-defined energy states. This opens new avenues for experimental investigations of three-dimensional Anderson localization.

Author(s): Valentin Volchkov and Michael Pasek and Vincent Denechaud and Musawwadah Mukhtar and Alain Aspect and Dominique Delande and Vincent Josse
Journal: Physical Review Letters
Volume: 120
Pages: 060404
Year: 2018
Month: January
Publisher: American Physical Society (APS)

Department(s): Optics & Sensing Laboratory
Bibtex Type: Article (article)
Paper Type: Journal

DOI: 10.1103/PhysRevLett.120.060404
State: Published


  title = {Measurement of Spectral Functions of Ultracold Atoms in Disordered Potentials},
  author = {Volchkov, Valentin and Pasek, Michael and Denechaud, Vincent and Mukhtar, Musawwadah and Aspect, Alain and Delande, Dominique and Josse, Vincent},
  journal = {Physical Review Letters},
  volume = {120},
  pages = {060404},
  publisher = {American Physical Society (APS)},
  month = jan,
  year = {2018},
  month_numeric = {1}