Effective interactions between two impurities in quasi-two-dimensional dipolar Bose-Einstein condensates
COMMUNICATIONS IN THEORETICAL PHYSICS(2020)
摘要
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.
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关键词
dipolar gas,impurity,effective interaction,roton excitation
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