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Article overview
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Why only half of the fermionic atoms were converted to molecules by a Feshbach resonance? | Hui Hu
; Feng Yuan
; Shaojin Qin
; | Date: |
24 Aug 2003 | Subject: | Statistical Mechanics | cond-mat.stat-mech | Abstract: | In some recent experiments an ultracold gas of $^{40}$K$_2$ (or $^{6}$Li$_2$) molecules has been produced from a degenerate two-component Fermi gas of $^{40}$K (or $^{6}$Li) atoms by adiabatic passage through a Feshbach resonance. The maximum atom-molecule transfer efficiency is reported to be about 50%. We propose a simple microscopic model to characterize the ground state of the gas in the vicinity of the resonance, and show that the term describing the atom-molecule coupling is responsible for the observed efficiency 50%. Our result also suggests that the experiments have produced a molecular condensate. | Source: | arXiv, cond-mat/0308474 | Services: | Forum | Review | PDF | Favorites |
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