Krems R V
Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
Phys Rev Lett. 2006 Mar 31;96(12):123202. doi: 10.1103/PhysRevLett.96.123202. Epub 2006 Mar 28.
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.
结果表明，形成异核碰撞复合体的超冷原子的弹性碰撞可通过实验室可行的直流电场进行操控。电场控制的机制基于碰撞对的瞬时偶极矩与外部电场的相互作用。结果表明，在碰撞阈值附近存在p波形状或费什巴赫散射共振的情况下，这种相互作用会显著增强，从而导致新型电场诱导的费什巴赫共振。
