Effective mass and superfluid fraction in a periodic ultracold Bose gas with long-range interaction

ORAL

Abstract

The scheme that superfluid fraction $f_s=\rho_s/\rho$ is equal to the ratio of bare to effective mass $m/m^*$ of the particles is applied to investigate the superfluid-supersolid (SF-SS) transition in a periodic ultracold Bose gas with long-range interaction. We consider both the Rydberg-dressed Bose gas with tunable blockade radius and coupling constant and the dipolar Bose gas with controllable coupling constant and polarization. Both the strong and week lattice limits are investigated.

*Financial support from the NSC of Taiwan is acknowledged.

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Authors

  • Che-Hsiu Hsueh

    • Department of Physics, National Taiwan Normal University, Taiwan

  • Yu-Ching Tsai

    • Department of Physics, National Taiwan Normal University and Department of Physics, National Changhua University of Education, Taiwan

  • Wen-Chin Wu

    • Department of Physics, National Taiwan Normal University, Taiwan