Very-high-precision bound-state spectroscopy near a {sup 85}Rb Feshbach resonance

Journal Article · Sun Jun 01 00:00:00 EDT 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.060701· OSTI ID:20636503

Claussen, N R; Thompson, S T; Donley, E A; Hodby, E; Wieman, C E ^[1]

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1. JILA, National Institute of Standards and Technology, University of Colorado, Colorado 80309-0440 (United States)

We precisely measured the binding energy ({epsilon}{sub bind}) of a molecular state near the Feshbach resonance in a {sup 85}Rb Bose-Einstein condensate (BEC). Rapid magnetic-field pulses induced coherent atom-molecule oscillations in the BEC. We measured the oscillation frequency as a function of B field and fit the data to a coupled-channel model. Our analysis constrained the Feshbach resonance position [155.041(18) G], width [10.71(2) G], and background scattering length [-443(3)a{sub 0}] and yielded new values for the Rb interaction parameters. These results improved our estimate for the stability condition of an attractive BEC. We also found evidence for a mean-field shift to {epsilon}{sub bind}.

• OSTI ID: 20636503
• Journal Information: Physical Review. A, Vol. 67, Issue 6; Other Information: DOI: 10.1103/PhysRevA.67.060701; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ACCURACY
ATOMS
BINDING ENERGY
BOSE-EINSTEIN CONDENSATION
BOUND STATE
COUPLED CHANNEL THEORY
MAGNETIC FIELDS
MEAN-FIELD THEORY
MOLECULES
OSCILLATIONS
POTENTIAL ENERGY
PULSES
RESONANCE
RUBIDIUM 85
SCATTERING LENGTHS
SPECTROSCOPY
STABILITY