Dynamics of evaporative cooling in magnetically trapped atomic hydrogen
Statistical Mechanics
2009-10-31 v1
Abstract
We study the evaporative cooling of magnetically trapped atomic hydrogen on the basis of the kinetic theory of a Bose gas. The dynamics of trapped atoms is described by the coupled differential equations, considering both the evaporation and dipolar spin relaxation processes. The numerical time-evolution calculations quantitatively agree with the recent experiment of Bose-Einstein condensation with atomic hydrogen. It is demonstrated that the balance between evaporative cooling and heating due to dipolar relaxation limits the number of condensates to 9x10^8 and the corresponding condensate fraction to a small value of 4% as observed experimentally.
Keywords
Cite
@article{arxiv.cond-mat/0007179,
title = {Dynamics of evaporative cooling in magnetically trapped atomic hydrogen},
author = {Makoto Yamashita and Masato Koashi and Tetsuya Mukai and Masaharu Mitsunaga and Nobuyuki Imoto},
journal= {arXiv preprint arXiv:cond-mat/0007179},
year = {2009}
}
Comments
5 pages, REVTeX, 3 eps figures, Phys. Rev. A in press