Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Transition From Collisionless to Hydrodynamic Behavior in an Ultracold Atomic Gas

Published

Author(s)

S D. Gensemer, D S. Jin

Abstract

Relative motion in a two-component, trapped gas provides a sensitive probe of interactions. By studying the lowest frequency excitations of a two spin-state gas confined in a magnetic trap, we have explored the transition from the collisionless regime to the hydrodynamic regime. As a function of collsion rate, we observe frequency shifts as large as 7 % as well as a dramatic, non-monotonic dependence of the damping rate. The measurements agree qualitatively with expectations for behavior in the collisionless and hydrodynamic limits and are quantitatively compared to a classical kinetic model.
Citation
Physical Review Letters
Volume
87
Issue
No. 17

Keywords

damping, excitations, hydrodynamic

Citation

Gensemer, S. and Jin, D. (2001), Transition From Collisionless to Hydrodynamic Behavior in an Ultracold Atomic Gas, Physical Review Letters (Accessed June 13, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created October 22, 2001, Updated February 17, 2017