Superfluid and Dissipative Dynamics of a Bose-Einstein Condensate in a Periodic Optical Potential
Condensed Matter
2009-05-28 v1
Abstract
We create Bose-Einstein condensates of 87-rubidium in a static magnetic trap with a superimposed blue-detuned 1D optical lattice. By displacing the magnetic trap center we are able to control the condensate evolution. We observe a change in the frequency of the center-of-mass oscillation in the harmonic trapping potential, in analogy with an increase in effective mass. For fluid velocities greater than a local speed of sound, we observe the onset of dissipative processes up to full removal of the superfluid component. A parallel simulation study visualizes the dynamics of the BEC and accounts for the main features of the observed behavior.
Cite
@article{arxiv.cond-mat/0102076,
title = {Superfluid and Dissipative Dynamics of a Bose-Einstein Condensate in a Periodic Optical Potential},
author = {S. Burger and F. S. Cataliotti and C. Fort and F. Minardi and M. Inguscio and M. L. Chiofalo and M. P. Tosi},
journal= {arXiv preprint arXiv:cond-mat/0102076},
year = {2009}
}
Comments
4 pages, including figures