Controlling atom-atom interaction at ultralow temperatures by dc electric fields

Details Controlling atom-atom interaction at ultralow temperatures by dc electric fields Controlling atom-atom interaction at ultralow temperatures by dc electric fields

1998-10-14

arxiv.org/abs/quant-ph/9810046v1

Phys.Rev.Lett.81:4596-4599,1998

Physics

Quantum Physics

4 pages, 5 figures, accepted for a publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.81.4596

We propose a physical mechanism for tuning the atom-atom interaction strength at ultra-low temperatures. In the presence of a dc electric field the interatomic potential is changed due to the effective dipole-dipole interaction between the polarized atoms. Detailed multi-channel scattering calculations reveal features never before discussed for ultra-cold atomic collisions. We demonstrate that optimal control of the effective atom-atom interactions can be achieved under reasonable laboratory conditions. Implications of this research on the physics of atomic Bose-Einstein condensation (BEC) and on the pursuit for atomic degenerate fermion gases will be discussed.

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