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Updated: Aug 19, 2025
11:21
Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
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Quench Dynamics of a Fermi Gas with Strong Nonlocal Interactions
Elmer Guardado-Sanchez1, Benjamin M Spar1, Peter Schauss2
1Department of Physics, Princeton University, Princeton, New Jersey 08544 USA.
Physical Review. X
|December 1, 2022
Summary
Researchers induced strong nonlocal interactions in a 2D Fermi gas using Rydberg dressing. Tunneling did not affect the gas lifetime, and strong interactions slowed charge-density wave relaxation, enabling quantum simulations.
Area of Science:
- Quantum simulation
- Ultracold atomic gases
- Many-body physics
Background:
- Rydberg dressing enables precise control over interactions in ultracold atomic gases.
- Understanding nonlocal interactions is crucial for simulating complex quantum systems like the extended Fermi-Hubbard model.
Purpose of the Study:
- To induce and study strong nonlocal interactions in a 2D Fermi gas.
- To investigate the interplay between interactions and tunneling.
- To explore the relaxation dynamics of charge-density waves.
Main Methods:
- Utilized Rydberg dressing to create strong nearest-neighbor interactions in a 2D Fermi gas on an optical lattice.
- Employed many-body Ramsey interferometry to measure interaction strength.
- Studied gas lifetime in the presence of tunneling.
- Investigated charge-density wave relaxation dynamics.
Main Results:
- Demonstrated successful induction of strong nonlocal interactions.
- Found that tunneling does not reduce the gas lifetime.
- Observed that strong nearest-neighbor interactions significantly slow down charge-density wave relaxation.
Conclusions:
- The system serves as a quantum simulator for models with strong nonlocal interactions.
- This work paves the way for simulating extended Fermi-Hubbard models and other complex quantum systems.
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