Optical and evaporative cooling of cesium atoms in the gravito-optical surface trap
Atomic Physics
2015-06-26 v1
Abstract
We report on cooling of an atomic cesium gas closely above an evanescent-wave atom mirror. At high densitities, optical cooling based on inelastic reflections is found to be limited by a density-dependent excess temperature and trap loss due to ultracold collisions involving repulsive molecular states. Nevertheless, very good starting conditions for subsequent evaporative cooling are obtained. Our first evaporation experiments show a temperature reduction from 10muK down to 300nK along with a gain in phase-space density of almost two orders of magnitude.
Keywords
Cite
@article{arxiv.physics/0005035,
title = {Optical and evaporative cooling of cesium atoms in the gravito-optical surface trap},
author = {M. Hammes and D. Rychtarik and V. Druzhinina and U. Moslener and I. Manek-Hönninger and R. Grimm},
journal= {arXiv preprint arXiv:physics/0005035},
year = {2015}
}
Comments
8 pages, 6 figures, submitted to Journal of Modern Optics, special issue "Fundamentals of Quantum Optics V", edited by F. Ehlotzky