English

Temperature dependence of $p$-wave contacts in a harmonically trapped Fermi gas

Quantum Gases 2026-01-12 v2 Atomic Physics

Abstract

We study the dependence of the pp-wave contact on the Fermi temperature TFT_F and reduced temperature T/TFT/T_F based on the number of closed-channel molecules. From the anisotropic pattern of dissociated molecules, we resolve the narrow m=0m=0 and m=±1m=\pm1 dipolar splitting of the pp-wave Feshbach resonance in 6^6Li, enabling the independent determination of the contact for all three mm components. For each component, we identify a near-resonant scaling with TF\sqrt{T_F}, indicating the contribution of the normalized effective range kFRek_F R_{\rm{e}}. In addition, we show that the peak contacts observed near resonance increase as T/TFT/T_F is lowered, a trend that is accurately captured by estimates based on the second-order virial expansion. Our results, together with estimates from the pp-wave virial expansion, provide a route toward a complete understanding of the thermodynamics of resonantly enhanced pp-wave Fermi gases.

Keywords

Cite

@article{arxiv.2509.04738,
  title  = {Temperature dependence of $p$-wave contacts in a harmonically trapped Fermi gas},
  author = {Kenta Nagase and Hikaru Takahashi and Soki Oshima and Takashi Mukaiyama},
  journal= {arXiv preprint arXiv:2509.04738},
  year   = {2026}
}

Comments

7 pages, 5 figures