Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 36: Quantum gases: Effects of interactions
Q 36.4: Talk
Thursday, March 20, 2014, 11:30–11:45, UDL HS2002
Understanding Feshbach resonances of 6Li and 133Cs — •Juris Ulmanis1, Rico Pires1, Marc Repp1, Eva D. Kuhnle1, Matthias Weidemüller1, Tobias Tiecke2, Chris Greene3, Brandon Ruzic4, John Bohn4, and Eberhard Tiemann5 — 1Physikalisches Institut, Im Neuenheimer Feld 226, 69120 Heidelberg — 2Department of Physics, Harvard University, Cambridge, Massachusetts, 02138, USA — 3Department of Physics, Purdue University, West Lafayette, Indiana, 47907-2036, USA — 4JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-0440, USA — 5Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
The recently measured interspecies Feshbach resonances in the Fermi-Bose mixture of Li-Cs [M. Repp et at., Phys. Rev. A 87, 010701(R) (2013)] provides an excellent system for exploring different topics in few- and many-body physics. It is a promising candidate for the creation of deeply bound polar molecules and polarons. For the investigation of these phenomena, precise knowledge of the scattering properties and molecular structure is necessary. In this talk we give a brief overview and quantitative comparison of three different theoretical models for description of Feshbach resonances, namely, coupled channels calculation, asymptotic bound state model and the multichannel quantum defect theory. Each model reproduces the previously observed collisional behaviour and allows to make important predictions for further experiments in the Li-Cs system.