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Phys Rev Lett. 2006 Mar 31;96(12):123202. Epub 2006 Mar 28.

Controlling collisions of ultracold atoms with dc electric fields.

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Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.


It is demonstrated that elastic collisions of ultracold atoms forming a heteronuclear collision complex can be manipulated by laboratory practicable dc electric fields. The mechanism of electric field control is based on the interaction of the instantaneous dipole moment of the collision pair with external electric fields. It is shown that this interaction is dramatically enhanced in the presence of a p-wave shape or Feshbach scattering resonance near the collision threshold, which leads to novel electric-field-induced Feshbach resonances.

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