Bosonic mixtures in two dimensions (Volker Karle)

  • Datum: 24.05.2018
  • Uhrzeit: 11:00 - 12:00
  • Vortragende(r): Volker Karle
  • Institut für Theoretische Physik an der Ruprecht-Karls-Universität Heidelberg, visiting MPQ from 23.05.2018 to 25.05.2018
  • Ort: Max-Planck-Institut für Quantenoptik
  • Raum: B 0.40
  • Gastgeber: MPQ, Theory Division, hosted by Dr. Richard Schmidt

In this talk a two-component bosonic gas in two dimensions at low temperatures with zero-range repulsive interaction is considered. In our work we focus on the coexistence phase with superfluid behavior in both components, where a new phenomenon appears: The non-dissipative drag, also called Andreev-Bashkin effect, as a result of the interbosonic interactions, which leads to a modification of the usual BKT-transition. Quantum fluctuations of the elementary excitations lead to further corrections of the phase boundary. We study the renormalization of the densities at finite temperatures using standard RG-methods.

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