Impurities in ultracold quantum gases beyond contact interactions

Zoom link: https://us06web.zoom.us/j/87057373249?pwd=MNnyk4rUf9cOVZoxeqIaKkhwYk5STm.1

Abstract

The impurity embedded in a medium acquires effective mass and can often be described as a quasiparticle. For strong interactions the problem becomes difficult to study, as one can no longer separate the lengthscales corresponding to few- and many-body phenomena. I will describe simple theoretical approaches which include the long-range nature of the potential at the cost of making other approximations, applicable both to Fermi and Bose gases.

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