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- W1760758215 abstract "We develop a systematic perturbation theory for the quasiparticle properties of a single impurity immersed in a Bose-Einstein condensate. Analytical results are derived for the impurity energy, effective mass, and residue to third order in the impurity-boson scattering length. The energy is shown to depend logarithmically on the scattering length to third order, whereas the residue and the effective mass are given by analytical power series. When the boson-boson scattering length equals the boson-impurity scattering length, the energy has the same structure as that of a weakly interacting Bose gas, including terms of the Lee-Huang-Yang and fourth order logarithmic form. Our results, which cannot be obtained within the canonical Frohlich model of an impurity interacting with phonons, provide valuable benchmarks for many-body theories and for experiments." @default.
- W1760758215 created "2016-06-24" @default.
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- W1760758215 date "2015-10-13" @default.
- W1760758215 modified "2023-10-01" @default.
- W1760758215 title "Quasiparticle Properties of a Mobile Impurity in a Bose-Einstein Condensate" @default.
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- W1760758215 doi "https://doi.org/10.1103/physrevlett.115.160401" @default.
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