Opto-Electrical Cooling of Polar Molecules

Details Opto-Electrical Cooling of Polar Molecules Opto-Electrical Cooling of Polar Molecules

2009-04-27

arxiv.org/abs/0904.4144v2

Physical Review A 80, 041401(R) (2009)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.80.041401

We present an opto-electrical cooling scheme for polar molecules based on a Sisyphus-type cooling cycle in suitably tailored electric trapping fields. Dissipation is provided by spontaneous vibrational decay in a closed level scheme found in symmetric-top rotors comprising six low-field-seeking rovibrational states. A generic trap design is presented. Suitable molecules are identified with vibrational decay rates on the order of 100Hz. A simulation of the cooling process shows that the molecular temperature can be reduced from 1K to 1mK in approximately 10s. The molecules remain electrically trapped during this time, indicating that the ultracold regime can be reached in an experimentally feasible scheme.

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