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This research aims to understand how trapping potentials influence the properties of the unitary Fermi gas near the BCS-BEC crossover.

August 7, 2026Physical Review AOpen Access

Trapping-potential dependence of the unitary Fermi gas at the BCS-BEC crossover

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Randomized trial examines how trapping potential alters unitary Fermi gas properties, indicating significant effects on excitations.

This research aims to understand how trapping potentials influence the properties of the unitary Fermi gas near the BCS-BEC crossover.
Analyzed the superfluid effective-field theory (EFT) in the presence of trapping potentials.
Classified corrections due to trapping into three distinct regions based on power counting.
Computed the energy spectrum by evaluating phonon-field fluctuations and dynamic structure factor modifications.
Significant deviations from linear dispersion in the far-infrared region of the superfluid EFT were found.
Predictions indicate that trapping potentials modify the dispersion relation's curvature, influencing relaxation mechanisms.
Establishes a systematic method for interpreting experimental data related to the unitary Fermi gas.

Beane et al. (2026) studied this question.

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