Effective interactions between two impurities in quasi-two-dimensional dipolar Bose–Einstein condensates

Authors:
  • FDFu-Lin Deng
    Fu-Lin Deng
  • TSTao Shi
    Tao Shi
  • SYSu Yi
    Su Yi
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Abstract
We investigate the effective interaction between two heavy impurities immersed in a quasi-two-dimensional dipolar Bose–Einstein condensate via a variation approach. We show that the mediated interaction is highly tunable via the contact and the dipole–dipole interactions between the background gas atoms. Interestingly, the mediated interaction potential may become an oscillating function of inter-impurity distance when roton excitation emerges under sufficiently strong dipolar interaction. Our system therefore provides an efficient way for tuning the mediated interaction between impurities.
Funding Information
  • National Natural Science Foundation of China (11947302)

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