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Theory of Feshbach molecule formation in a dilute gas during a magnetic field ramp | J. E. Williams
; N. Nygaard
; C. W. Clark
; PostScript
; PDF
; Other formats
; | Date: |
1 Nov 2005 | Subject: | Other | Abstract: | Starting with coupled atom-molecule Boltzmann equations, we develop a simplified model to understand molecule formation observed in recent experiments. Our theory predicts several key features: (1) the effective adiabatic rate constant is proportional to density; (2) in an adiabatic ramp, the dependence of molecular fraction on magnetic field resembles an error function whose width and centroid are related to the temperature; (3) the molecular production efficiency is a universal function of the initial phase space density, the specific form of which we derive for a classical gas. Our predictions show qualitative agreement with the data from [Hodby et al, Phys. Rev. Lett. {f{94}}, 120402 (2005)] without the use of adjustable parameters. | Source: | arXiv, cond-mat/0511011 | Services: | Forum | Review | PDF | Favorites |
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