  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.
