title: Modification of scattering lengths via magnetic dipole-dipole interactions.
abstract: 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.
authors.affiliation: A. F. Ioffe Physico-Technical Institute, St. Petersburg 194021, Russia.
authors.forename: I E
authors.initials: IE
authors.lastname: Mazets
authors.forename: G
authors.initials: G
authors.lastname: Kurizki