Multiplet Structure of Feshbach Resonances in non-zero partial waves

Abstract

We report a unique feature of magnetic field Feshbach resonances in which atoms collide with non-zero orbital angular momentum. P-wave ($l=1$) Feshbach resonances are split into two components depending on the magnitude of the resonant state's projection of orbital angular momentum onto the field axis. This splitting is due to the magnetic dipole-dipole interaction between the atoms and it offers a means to tune anisotropic interactions of an ultra-cold gas of atoms. A parameterization of the resonance in terms of an effective range expansion is given.

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• Bose-Einstein condensation in trapped dipolar gases
• Conversion of an Atomic Fermi Gas to a Long-Lived Molecular Bose Gas
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• Recombination of three ultracold fermionic atoms
• Magnetic field control of elastic scattering in a cold gas of fermionic lithium atoms
• Anisotropic pseudo-potential for polarized dilute quantum gases
• Effective s- and p-Wave Contact Interactions in Trapped Degenerate Fermi Gases
• Probing dipolar effects with condensate shape oscillation
• Improved Characterization of Elastic Scattering Near a Feshbach Resonance in 85Rb
• Stability of Trapped Ultracold Fermi Gases Using Effective s- and p-Wave Contact-Interactions

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