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Updated: Jun 19, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Hopping modulation in a one-dimensional Fermi-Hubbard Hamiltonian.
Francesco Massel1, Mikko J Leskinen, Päivi Törmä
1Department of Applied Physics, 02015 Helsinki University of Technology, Finland.
We studied a repulsive Fermi gas in a 1D optical lattice, analyzing its response to modulated hopping. The system exhibits a unique double occupancy frequency dependence linked to its spectral properties.
Area of Science:
- Quantum physics
- Condensed matter physics
- Ultracold atomic gases
Background:
- Strongly repulsive two-component Fermi gas in a 1D optical lattice.
- Hubbard Hamiltonian model for interacting fermions.
- Periodic modulation of hopping amplitude.
Purpose of the Study:
- Analyze the response of the Fermi gas to periodic modulation.
- Investigate the double occupancy frequency dependence.
- Relate the observed phenomena to spectral features.
Main Methods:
- Exact simulations of time evolution.
- Bethe ansatz for spectral analysis.
- Analysis of double occupancy in response to modulation.
Main Results:
- A nontrivial double occupancy frequency dependence was observed.
- This dependence is directly related to the system's spectral features.
- The discrete spectrum's nature is reflected in the double occupancy over time.
Conclusions:
- The study reveals a clear link between spectral properties and system dynamics.
- Findings highlight the impact of discrete spectral features on observable quantities.
- Implications for higher-dimensional systems and experimental applications are discussed.
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