On the Stability of the Repulsive Fermi Gas with Short-Range Interactions

ORAL

Abstract

We investigate the stability of a uniform spin-balanced repulsive Fermi gas with short-range interactions. When the atom loss is dominated by background gas collisions, we observe isoenthalpic heating, the quantum Joule-Thomson effect of a nearly ideal Fermi gas. At stronger interactions, we observe the threshold law for three-body recombination with two indistinguishable fermions, i.e. the linear dependence of the three-body loss coefficient, K3, on kinetic energy. We also measure the scaling relation between K3 and the two-body scattering length, K3 ∝ a6 across more than three decades.

*We acknowledge support from Trinity College (Cambridge), the David and Lucile Packard Foundation, the Alfred P. Sloan Foundation, and NSF CAREER (Grant No. 1945324)

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Presenters

  • Yunpeng Ji

    • Yale University

Authors

  • Yunpeng Ji

    • Yale University

  • Gabriel Assumpcao

    • Yale University

  • Jianyi Chen

    • Yale University

  • Jere Makinen

    • Yale University, Yale Quantum Institute

  • Grant Schumacher

    • Yale University

  • Philip Tuckman

    • Yale University

  • Franklin Vivanco

    • Yale University

  • Nir Navon

    • Yale University, Yale Quantum Institute