Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster: Quantum Optics and Photonics I

Q 15.5: Poster

Monday, March 23, 2015, 17:00–19:00, C/Foyer

Ground State of Bose-Fermi Mixtures within Mean Field Approximation — •Christian Ufrecht, Albert Roura, Wolfgang P. Schleich, and the QUANTUS Team — Institut für Quantenphysik, Universität Ulm

In recent years, a large number of experiments with boson-fermion mixtures have been carried out. If the temperature is below a critical value then Bose-Einstein condensation occurs for bosons while it gives rise to a degenerate Fermi gas for fermions.

For polarized fermions and sufficiently high particle numbers, interacting boson-fermion mixtures can be described by a mean field theory for bosons combined with the Thomas-Fermi approximation for fermions.

Due to different values of the coupling parameter between bosons and fermions, we find a large variety of different ground states. By using geometric arguments we determine the qualitative densities, make statements about stability and derive analytic conditions for different ground state scenarios.

The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number 50WM1136.