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arxiv: 2210.15981 · v2 · pith:YNQ7GRAOnew · submitted 2022-10-28 · ❄️ cond-mat.quant-gas · physics.atom-ph· quant-ph

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

classification ❄️ cond-mat.quant-gas physics.atom-phquant-ph
keywords lossanomalousbehaviorcollisionevolutionfermifeshbachresonance
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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.

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