Density fluctuations in a two-dimensional SU(N) Fermi gas

ORAL

Abstract

In an interacting SU(N) Fermi gas, interaction effects are enhanced by SU(N) symmetry and therefore thermodynamics is expected to depend on spin multiplicity N. Here, we demonstrate a direct measurement of spin-dependent density fluctuations of two-dimensional degenerate Fermi gasses with SU(N) symmetry. The scaling of compressibility with spin multiplicity is extracted from the fluctuation-dissipation theorem. This work extends the quantitative thermodynamic study to lower dimensions.

*We acknowledge the generous support from the Research Grants Councils of Hong Kong, the Croucher Foundation and the Hari Harilela foundation through 16305317, 16304918, 16306119, 16302420, C6005-17G and N-HKUST601/17 and the Croucher Innovation grants respectively.

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Presenters

  • Chengdong HE

    • Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China

Authors

  • Chengdong HE

    • Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China

  • Entong ZHAO

    • Hong Kong University of Science and Tech
    • Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China

  • Zejian Ren

    • Hong Kong University of Science and Tech
    • Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China

  • Elnur Hajiyev

    • Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China

  • Ka Kwan Pak

    • Hong Kong University of Science and Tech
    • Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China

  • Gyu-boong Jo

    • Hong Kong University of Science and Tech
    • Hong Kong University of Science and Technology
    • Department of Physics, Hong Kong University of Science and Technology, Hong Kong SAR, China