Abstract
High partial-wave () Feshbach resonance (FR) in an ultracold mixture of atoms is investigated experimentally aided by a partial-wave insensitive analytic multichannel quantum-defect theory. Two “broad” resonances from coupling between waves in both the open and closed channels are observed and characterized. One of them shows a fully resolved triplet structure with a splitting ratio well explained by the perturbation to the closed channel due to interatomic spin-spin interaction. These tunable “broad” -wave resonances, especially the one in the lowest-energy open channel, could find important applications in simulating -wave coupling dominated many-body systems. In addition, we find that there is generally a time and temperature requirement, associated with tunneling through the angular momentum barrier, to establish and observe resonant coupling in nonzero partial waves.
- Received 3 August 2017
DOI:https://doi.org/10.1103/PhysRevLett.119.203402
© 2017 American Physical Society
Physics Subject Headings (PhySH)
Viewpoint
Scattering Atoms Catch the d Wave
Published 13 November 2017
d-wave interactions like those thought to underlie unconventional superconductivity have been implemented in a cold-atom gas.
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