title: Impurities in Bose-Einstein Condensates: From Polaron to Soliton.
abstract: We propose that impurities in a Bose-Einstein condensate which is coupled to a transversely laser-pumped multimode cavity form an experimentally accessible and analytically tractable model system for the study of impurities solvated in correlated liquids and the breakdown of linear-response theory [corrected]. As the strength of the coupling constant between the impurity and the Bose-Einstein condensate is increased, which is possible through Feshbach resonance methods, the impurity passes from a large to a small polaron state, and then to an impurity-soliton state. This last transition marks the breakdown of linear-response theory.
authors.affiliation: Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
authors.forename: Shahriar
authors.initials: S
authors.lastname: Shadkhoo
authors.affiliation: Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.|Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA.
authors.forename: Robijn
authors.initials: R
authors.lastname: Bruinsma