Journal article
Stationary and nonstationary fluid flow of a bose-einstein condensate through a penetrable barrier
Physical review letters, Vol.99(16), pp.160405-160405
10/19/2007
Handle:
https://hdl.handle.net/2376/104011
PMID: 17995227
Abstract
We experimentally study the fluid flow induced by a broad, penetrable barrier moving through an elongated dilute gaseous Bose-Einstein condensate. The barrier is created by a laser beam swept through the condensate, and the resulting dipole potential can be either attractive or repulsive. We examine both cases and find regimes of stable and unstable fluid flow: At slow speeds of the barrier, the fluid flow is steady due to the superfluidity of the condensate. At intermediate speeds, we observe an unsteady regime in which the condensate gets filled with dark solitons. At faster speeds, soliton formation completely ceases, and a remarkable absence of excitation in the condensate is seen again.
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Details
- Title
- Stationary and nonstationary fluid flow of a bose-einstein condensate through a penetrable barrier
- Creators
- P Engels - Washington State University, Department of Physics and Astronomy, Pullman, Washington 99164, USA. engels@wsu.eduC Atherton
- Publication Details
- Physical review letters, Vol.99(16), pp.160405-160405
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- United States
- Identifiers
- 99900546660201842
- Language
- English
- Resource Type
- Journal article