Anomalous loss behavior in a single-component Fermi gas close to a $p$-Wave Feshbach resonance

Abstract

We theoretically investigate three-body losses in a single-component Fermi gas near a $p$-wave Feshbach resonance in the interacting, non-unitary regime. We extend the cascade model introduced by Waseem \textit{et al.} [M. Waseem, J. Yoshida, T. Saito, and T. Mukaiyama, Phys. Rev. A \textbf{99}, 052704 (2019)] to describe the elastic and inelastic collision processes. We find that the loss behavior exhibits a $n^3$ and an anomalous $n^2$ density dependence for a ratio of elastic-to-inelastic collision rate larger and smaller than 1, respectively. The corresponding evolutions of the energy distribution show collisional cooling or evolution toward low-energetic non-thermalized steady states, respectively. These findings are particularly relevant for understanding atom loss and energetic evolution of ultracold gases of fermionic lithium atoms in their ground state.

References in corpus (13)

• Many-Body Physics with Ultracold Gases
• Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
• Weakly bound dimers of fermionic atoms
• Collective excitations of a degenerate gas at the BEC-BCS crossover
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• Binding Energies of 6Li p-wave Feshbach Molecules
• Two-body relaxation in a Fermi gas at a p-wave Feshbach resonance
• Quantitative analysis of $p$-wave three-body losses via cascade process
• Tree-body loss of of trapped ultracold ${}^{87}$Rb atoms due to a Feshbach resonance
• Optimization of collisional Feshbach cooling of an ultracold nondegenerate gas

Cited by in corpus (2)

• Non-Hermitian $p$-wave superfluid and effects of the inelastic three-body loss in a one-dimensional spin-polarized Fermi gas
• Elastic collision rates of spin-polarized fermions in two dimensions