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- W2233991844 abstract "The Frohlich model describes the interaction of a mobile impurity with a surrounding bath of phonons which leads to the formation of a quasiparticle, the polaron. In this article an efficient renormalization group approach is presented which provides a description of Frohlich polarons in all regimes ranging from weak- to strong coupling. We apply the method to the Bose polaron problem of an ultracold impurity atom interacting with a background gas that is Bose-condensed. The extended renormalization group approach introduced here is capable to predict ground state properties for arbitrarily small impurity masses. This allows us to obtain the full phase diagram of the corresponding Bogoliubov-Frohlich Hamiltonian, characterized by two dimensionless coupling constants. Our method is benchmarked by comparison of the ground state energy to recent diagrammatic quantum Monte Carlo calculations." @default.
- W2233991844 created "2016-06-24" @default.
- W2233991844 creator A5013404739 @default.
- W2233991844 date "2016-04-18" @default.
- W2233991844 modified "2023-10-17" @default.
- W2233991844 title "All-coupling theory for the Fröhlich polaron" @default.
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- W2233991844 doi "https://doi.org/10.1103/physrevb.93.144302" @default.
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