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Updated: Feb 14, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Measurement of Spectral Functions of Ultracold Atoms in Disordered Potentials.
Valentin V Volchkov1,2, Michael Pasek1,3, Vincent Denechaud1,4
1Laboratoire Charles Fabry, Institut d'Optique, CNRS, Université Paris-Saclay, 91127 Palaiseau cedex, France.
Researchers measured spectral functions of ultracold atoms in disordered potentials, observing a transition from quantum to classical regimes. This work advances the study of three-dimensional Anderson localization.
Area of Science:
- Atomic physics
- Condensed matter physics
- Quantum optics
Background:
- Ultracold atoms provide a controllable platform for studying quantum phenomena.
- Disordered potentials are crucial for understanding Anderson localization.
- Optical speckle fields offer a tunable method for creating disorder.
Purpose of the Study:
- To measure spectral functions of noninteracting ultracold atoms in a 3D disordered potential.
- To investigate the crossover between quantum (perturbative) and classical regimes of disorder.
- To validate experimental findings against numerical simulations.
Main Methods:
- Utilizing ultracold atoms in a three-dimensional optical speckle field.
- Varying disorder strength over two orders of magnitude.
- Employing state-dependent disorder and controlled atomic transfer for precise energy state creation.
Main Results:
- Observed the spectral function crossover from low to high disorder strength.
- Demonstrated excellent agreement between experimental measurements and numerical simulations.
- Characterized the transition from quantum to classical disorder regimes.
Conclusions:
- The experimental method successfully probes spectral functions in disordered systems.
- The findings support theoretical predictions for Anderson localization in 3D.
- This research opens new experimental pathways for studying 3D Anderson localization.
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