corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 102 » Issue 9
< Previous Article | Next Article >

Phys. Rev. Lett. 102, 090402 (2009) [4 pages]

Extreme Tunability of Interactions in a 7Li Bose-Einstein Condensate

Download: PDF (517 kB) Buy this article Export: BibTeX or EndNote (RIS)

S. E. Pollack, D. Dries, M. Junker*, Y. P. Chen†, T. A. Corcovilos, and R. G. Hulet
Department of Physics and Astronomy and Rice Quantum Institute, Rice University, Houston, Texas 77005, USA

Received 26 November 2008; published 6 March 2009

We use a Feshbach resonance to tune the scattering length a of a Bose-Einstein condensate of 7Li in the |F=1,mF=1⟩ state. Using the spatial extent of the trapped condensate, we extract a over a range spanning 7 decades from small attractive interactions to extremely strong repulsive interactions. The shallow zero crossing in the wing of the Feshbach resonance enables the determination of a as small as 0.01 Bohr radii. Evidence of the weak anisotropic magnetic dipole interaction is obtained by comparison with different trap geometries for small a.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.090402
DOI:
10.1103/PhysRevLett.102.090402
PACS:
03.75.Hh, 03.65.Db, 03.75.Nt, 67.85.Bc

*Present address: School of Physics, University of Melbourne, Victoria 3010, Australia

†Present address: Deptartment of Physics, Purdue University, 525 Northwestern Avenue, West Lafayette, Indiana 47907, USA

 
< Previous Article | Next Article >