Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.090402
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Funding
- NSF
- ONR
- Keck Foundation
- Welch Foundation [C-1133]
- Division Of Physics
- Direct For Mathematical & Physical Scien [0801457] Funding Source: National Science Foundation
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We use a Feshbach resonance to tune the scattering length a of a Bose-Einstein condensate of Li-7 in the vertical bar F=1,m(F)=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.
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