Title | Theory of Feshbach molecule formation in a dilute gas during a magnetic field ramp |
Publication Type | Journal Article |
Year of Publication | 2006 |
Authors | J. E. Williams, N. Nygaard, and C. W. Clark |
Journal | New J. Phys. |
Volume | 8 |
Pagination | 150–150 |
Date Published | aug |
ISSN | 1367-2630 |
Keywords | 2006, Single Fellow |
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: (i) the effective adiabatic rate constant is proportional to density; (ii) 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; and (iii) 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 (2005 Phys. Rev. Lett. 94 120402) without the use of adjustable parameters. |
URL | http://stacks.iop.org/1367-2630/8/i=8/a=150 |