Experimental study of the BEC-BCS crossover region in lithium 6

We report Bose-Einstein condensation of weakly bound 6Li2 molecules in a crossed optical trap near a Feshbach resonance. We measure a molecule-molecule scattering length of 170(+100)(-60) nm at 770 G, in good agreement with theory. We study the 2D expansion of the cloud and show deviation from hydro...

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Veröffentlicht in:	Physical review letters 2004-07, Vol.93 (5), p.050401.1-050401.4, Article 050401
Hauptverfasser:	BOURDEL, T, KHAYKOVICH, L, CUBIZOLLES, J, ZHANG, J, CHEVY, F, TEICHMANN, M, TARRUELL, L, KOKKELMANS, S. J. J. M. F, SALOMON, C
Format:	Artikel
Sprache:	eng
Schlagworte:	Classical and quantum physics: mechanics and fields Exact sciences and technology Fermion systems and electron gas Matter waves Physics Quantum statistical mechanics Statistical physics, thermodynamics, and nonlinear dynamical systems
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Beschreibung
Zusammenfassung:	We report Bose-Einstein condensation of weakly bound 6Li2 molecules in a crossed optical trap near a Feshbach resonance. We measure a molecule-molecule scattering length of 170(+100)(-60) nm at 770 G, in good agreement with theory. We study the 2D expansion of the cloud and show deviation from hydrodynamic behavior in the BEC-BCS crossover region.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.93.050401