Multi frequency evaporative cooling to BEC in a high magnetic field
Atomic Physics
2010-03-19 v2 General Physics
Abstract
We demonstrate a way to circumvent the interruption of evaporative cooling observed at high bias field for Rb atoms trapped in the (F=2, m=+2) ground state. Our scheme uses a 3-frequencies-RF-knife achieved by mixing two RF frequencies. This compensates part of the non linearity of the Zeeman effect, allowing us to achieve BEC where standard 1-frequency-RF-knife evaporation method did not work. We are able to get efficient evaporative cooling, provided that the residual detuning between the transition and the RF frequencies in our scheme is smaller than the power broadening of the RF transitions at the end of the evaporation ramp.
Cite
@article{arxiv.physics/0005014,
title = {Multi frequency evaporative cooling to BEC in a high magnetic field},
author = {V. Boyer and S. Murdoch and Y. Le Coq and G. Delannoy and P. Bouyer and A. Aspect},
journal= {arXiv preprint arXiv:physics/0005014},
year = {2010}
}
Comments
12 pages, 2 figures