A Large Atom Number Metastable Helium Bose-Einstein Condensate
Other Condensed Matter
2007-05-23 v2
Abstract
We have produced a Bose-Einstein condensate of metastable helium (4He*) containing over 1.5x10^7 atoms, which is a factor of 25 higher than previously achieved. The improved starting conditions for evaporative cooling are obtained by applying one-dimensional Doppler cooling inside a magnetic trap. The same technique is successfully used to cool the spin-polarized fermionic isotope (3He*), for which thermalizing collisions are highly suppressed. Our detection techniques include absorption imaging, time-of-flight measurements on a microchannel plate detector and ion counting to monitor the formation and decay of the condensate.
Cite
@article{arxiv.cond-mat/0510006,
title = {A Large Atom Number Metastable Helium Bose-Einstein Condensate},
author = {A. S. Tychkov and T. Jeltes and J. M. McNamara and P. J. J. Tol and N. Herschbach and W. Hogervorst and W. Vassen},
journal= {arXiv preprint arXiv:cond-mat/0510006},
year = {2007}
}
Comments
4 pages, 3 figures (changed content)