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- Title
- Hydrodynamic expansion of a strongly interacting fermi-fermi mixture
- Author(s)
- Trenkwalder, A.; Kohstall, C.; Zaccanti, M.; Naik, D.; Sidorov, A. I.; Schreck, F.; Grimm, R.
- Abstract
- We report on the expansion of an ultracold Fermi-Fermi mixture of 6Li and 40K under conditions of strong interactions controlled via an interspecies Feshbach resonance. We study the expansion of the mixture after release from the trap and, in a narrow magnetic-field range, we observe two phenomena related to hydrodynamic behavior. The common inversion of the aspect ratio is found to be accompanied by a collective effect where both species stick together and expand jointly despite of their widely different masses. Our work constitutes a major experimental step for a controlled investigation of the many-body physics of this novel strongly interacting quantum system
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Atom Optics and Ultrafast Spectroscopy. Centre of Excellence for Quantum-Atom Optics
- Source
- Physical Review Letters, Vol. 106, no. 11 (Mar 2011), article no. 115304
- Publication year
- 2011
- FOR Code(s)
- 01 Mathematical Sciences; 02 Physical Sciences; 09 Engineering
- Keyword(s)
- Fermi gases; Hydrodynamic behaviour; Hydrodynamic expansion; Ultracold Fermi-Fermi mixture
- Publisher
- American Physical Society
- ISSN
- 0031-9007
- Publisher URL
- http://dx.doi.org/10.1103/PhysRevLett.106.115304/
- Copyright
- Copyright © 2011 American Physical Society. Published version of the paper reproduced here with the kind permission of the publisher.
- Additional information
- The authors acknowledge support from the Austrian Science Fund (FWF) and the European Science Foundation (ESF) within the EuroQUAM/FerMix project and the FWF through the SFB FoQuS.
- Full text
- Peer reviewed
