title: Measurement of optical Feshbach resonances in an ideal gas.
abstract: Using a narrow intercombination line in alkaline earth atoms to mitigate large inelastic losses, we explore the optical Feshbach resonance effect in an ultracold gas of bosonic (88)Sr. A systematic measurement of three resonances allows precise determinations of the optical Feshbach resonance strength and scaling law, in agreement with coupled-channel theory. Resonant enhancement of the complex scattering length leads to thermalization mediated by elastic and inelastic collisions in an otherwise ideal gas. Optical Feshbach resonance could be used to control atomic interactions with high spatial and temporal resolution.
authors: JILA and Department of Physics, NIST and University of Colorado, Boulder, 80309-0440, USA.
authors: S
authors: S
authors: Blatt
authors: T L
authors: TL
authors: Nicholson
authors: B J
authors: BJ
authors: Bloom
authors: J R
authors: JR
authors: Williams
authors: J W
authors: JW
authors: Thomsen
authors: P S
authors: PS
authors: Julienne
authors: J
authors: J
authors: Ye