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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

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Cooling Atomic Gases With Disorder.

Thereza Paiva¹, Ehsan Khatami², Shuxiang Yang³

¹Departamento de Física dos Sólidos, Instituto de Física, Universidade Federal do Rio de Janeiro, 21945-970 Rio de Janeiro, Rio de Janeiro, Brazil.

Physical Review Letters

|December 27, 2015

Summary

This summary is machine-generated.

Researchers propose a novel method using disordered potentials and constant entropy trajectories to achieve low temperatures in cold atomic gases. This approach enables the exploration of magnetism and superconductivity in fermionic atom lattices, approaching the Néel temperature for the 3D Hubbard model.

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Area of Science:

Quantum simulation
Condensed matter physics
Cold atomic gases

Background:

Cold atomic gases emulate phenomena like Bose-Einstein condensation and the quantum Hall effect.
Achieving low temperatures for magnetism and superconductivity in fermionic atom lattices is challenging.

Purpose of the Study:

To propose a method for producing low-temperature cold atomic gases.
To enable the study of magnetism and exotic superconductivity in fermionic atom lattices.
To explore incompletely understood quantum phases.

Main Methods:

Preparing cold atomic gases in a disordered potential.
Utilizing a constant entropy trajectory to transition to a nondisordered state.
Employing quantum Monte Carlo simulations.

Main Results:

The proposed method can approach the Néel temperature of the three-dimensional Hubbard model.
Simulations show feasibility for experimentally achievable parameters.
The required randomness is in a regime where atom transport and equilibration are robust.

Conclusions:

The proposed method offers a viable pathway to low-temperature regimes for studying quantum magnetism and superconductivity.
This technique facilitates the investigation of exotic phases in fermionic atom systems.
Quantum Monte Carlo simulations validate the approach for future experimental exploration.