Observation of Superfluid Flow in a Bose-Einstein Condensed Gas
Soft Condensed Matter
2009-10-31 v1 Statistical Mechanics
Abstract
We have studied the hydrodynamic flow in a Bose-Einstein condensate stirred by a macroscopic object, a blue detuned laser beam, using nondestructive {\em in situ} phase contrast imaging. A critical velocity for the onset of a pressure gradient has been observed, and shown to be density dependent. The technique has been compared to a calorimetric method used previously to measure the heating induced by the motion of the laser beam.
Keywords
Cite
@article{arxiv.cond-mat/0006111,
title = {Observation of Superfluid Flow in a Bose-Einstein Condensed Gas},
author = {R. Onofrio and C. Raman and J. M. Vogels and J. Abo-Shaeer and A. P. Chikkatur and W. Ketterle},
journal= {arXiv preprint arXiv:cond-mat/0006111},
year = {2009}
}
Comments
4 pages, 5 figures