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We study the properties of an impurity immersed in a weakly interacting Bosegas, i.e., of a Bose polaron. In the perturbatively-tractable of limit weakimpurity-boson interactions many of its properties are known to depend only onthe scattering length. Here we demonstrate that for strong (unitary)impurity-boson interactions all static quasiproperties of a Bose polaron in adilute Bose gas, such as its energy, its residue, its Tan's contact and thenumber of bosons trapped nearby the impurity, depend on the impurity-bosonpotential via a single parameter.

Universal aspects of a strongly interacting impurity in a dilute Bose condensate