Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 38: Poster: Quantum Optics and Photonics I

Q 38.10: Poster

Dienstag, 6. März 2018, 16:15–18:15, Orangerie

Superfluidity and Vortex interactions in 2D Bose mixtures — •Volker Karle — Institut für Theoretische Physik, Universität Heidelberg, D-69120 Heidelberg

Two-component Bose mixtures in low dimensions are at the center of the current interest in Bose droplets. We theoretically consider a two-component bosonic gas in two dimensions at low temperatures with zero-range repulsive interaction. While mapping the classical binary liquid to an Ising-like model provides corrections to the mean-field densities, in 2D another phenomenon appears: The non-dissipative drag, also called Andreev-Bashkin effect, leads to a modification of the usual BKT-transition for the coexistence phase where both components exhibit superfluid behavior at the same time. We study the renormalization of the densities at finite temperatures using standard RG-methods.