Two- and three-body effective potentials between impurities in ideal BEC
arXiv:1909.01256
Abstract
We exactly calculate the full temperature dependence of Casimir-like forces appearing between two and three static impurities loaded in the ideal Bose gas below the Bose-Einstein condensation transition point. Assuming the short-ranged character of the boson-impurity interaction, the calculation procedure presented here can be easily extended on a Bose system with an arbitrary number of impurities immersed.
9+epsilon pages, 8 figures; the manuscript was substantially extended