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Prospects for making polar molecules with microwave fields

Kotochigova, S
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Journal Article
Date
2007-08-17
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quant-ph
 quant-ph
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http://hdl.handle.net/20.500.12613/6096
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0704.2648v1.pdf
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10.1103/PhysRevLett.99.073003
Abstract
We propose a mechanism to produce ultracold polar molecules with microwave fields. It converts trapped ultracold atoms into vibrationally excited molecules by a single microwave transition and entirely depends on the existence of a permanent dipole moment in the molecules. As opposed to production of molecules by photoassociation or magnetic-field Feshbach resonances, our method does not rely on properties of excited states or existence of Feshbach resonances. We determine conditions for optimal creation of polar molecules in vibrationally excited states of the ground-state potential by changing frequency and intensity of the microwave field. We also explore the possibility to produce vibrationally cold molecules by combining the microwave field with an optical Raman transition or by applying a microwave field to Feshbach molecules. The production mechanism is illustrated for KRb and RbCs. © 2007 The American Physical Society.
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Physical Review Letters
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