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

Abstract

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

arXiv comment6 pages, 3 figures, plus Supplemental Material

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Cited by in corpus (26)

• Quantum behavior of a heavy impurity strongly coupled to a Bose gas
• Many-body bound states and induced interactions of charged impurities in a bosonic bath
• Life and death of the Bose polaron
• Quench Dynamics of the Ideal Bose Polaron at Zero and Nonzero Temperatures
• Renormalization group study of Bose polarons
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• Linear rotor in an ideal Bose gas near the threshold for binding
• Quantum rotor in a two-dimensional mesoscopic Bose gas
• Polaronic dressing of bound states
• Validity of the Fröhlich model for a mobile impurity in a Bose-Einstein condensate