Modification of scattering lengths via magnetic dipole-dipole interactions.
We propose a new mechanism for tuning an atomic s-wave scattering length. The effect is caused by virtual transitions between different Zeeman sublevels via magnetic dipole-dipole interactions. These transitions give rise to an effective potential, which, in contrast to standard magnetic interactions, has an isotropic component and thus affects s-wave collisions.
Mazets
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A. F. Ioffe Physico-Technical Institute, St. Petersburg 194021, Russia.
Kurizki
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