Radio-frequency association of molecules: the dressed state picture

Details Radio-frequency association of molecules: the dressed state picture Radio-frequency association of molecules: the dressed state picture

2008-12-23

arxiv.org/abs/0812.4355v1

Physics

Atomic Physics

4 pages, 2 figures

Scientific paper

We develop a theoretical model to describe the radio-frequency (rf) induced coupling of a pair of colliding atoms to a Feshbach molecule when a magnetic field arbitrarily far from the Feshbach resonance is modulated in time. We use the dressed atom picture, and show that the coupling strength in presence of rf is equal to the Feshbach coupling strength multiplied by the square of a Bessel function. The argument of this function is equal to the ratio of the atomic rf Rabi frequency to the rf frequency. We experimentally demonstrate this law by measuring the rate of rf-association of molecules using a Feshbach resonance in d-wave collisions between ultra-cold chromium atoms.

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