A simple model of Feshbach molecules

Details A simple model of Feshbach molecules A simple model of Feshbach molecules

2005-06-14

arxiv.org/abs/cond-mat/0506313v2

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

We present a two-channel model to describe the quantum state of two atoms with finite-range interaction near a Feshbach resonance. This model provides a simple picture to analytically derive the wave function and the binding energy of the molecular bound state. The results agree excellently with the measurements and multichannel calculations. For small binding energies, the system enters a threshold regime in which the Feshbach molecules are identical to long range atom pairs in single channel. According to their threshold behavior, we find Feshbach resonances can be classified into two types.

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