Abstract
A heavy impurity moving in a superfluid has remarkable properties. The medium dresses the impurity into a polaronic quasiparticle, and at strong binding the polaron can substantially deform the surrounding medium. When there are two or more polarons, fluctuations of the medium induce a Casimir interaction between polarons. We investigate this induced interaction using the Gross-Pitaevskii equation and effective field theory (EFT) and find regimes of scale invariance, Yukawa and power-law scaling.
Biography
Professor Tilman Enss obtained his Ph.D from Max-Planck-Institut für Festkörperforschung, and is currently a Professor at the Institut für Theoretische Physik, Universität Heidelberg, Germany. His research focuses on many-body theory, mainly dynamics and transport in strongly correlated quantum systems, ranging from ultracold atomic gases to superconductors and quantum wires.
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