All-optical production of {sup 7}Li Bose-Einstein condensation using Feshbach resonances

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.77.023604· OSTI ID:21140525

Gross, Noam; Khaykovich, Lev ^[1]

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1. Department of Physics, Bar-Ilan University, Ramat-Gan, 52900 (Israel)

We show an all-optical method of making {sup 7}Li condensates using the tunability of the scattering length in the proximity of a Feshbach resonance. We report the observation of two Feshbach resonances on the |F=1,m{sub F}=0> state. A narrow (broad) resonance of 7 G (34 G) width is detected at 831{+-}4 G (884{sub -13}{sup +4} G). The position of the scattering length zero crossing between the resonances is found at 836{+-}4 G. The broad resonance is shown to be favorable for runaway evaporation which we perform in a crossed-beam optical-dipole trap. Starting directly from the phase-space density of a magneto-optical trap we observe a Bose-Einstein condensation threshold in less than 3 s of forced evaporation.

• OSTI ID: 21140525
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 77; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
COLLIDING BEAMS
DENSITY
DIPOLES
EVAPORATION
LITHIUM 7
MAGNETO-OPTICAL EFFECTS
PHASE SPACE
RADIATION PRESSURE
RESONANCE
SCATTERING LENGTHS
TRAPS