Generating ring dark solitons in an evolving Bose-Einstein condensate

Journal Article · Sat Dec 15 04:00:00 EST 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.063606· OSTI ID:21140678

Shijie, Yang; Quansheng, Wu; Shengnan, Zhang; Shiping, Feng; Wenan, Guo ^[1]; Yuchuan, Wen ^[2]; Yue, Yu ^[3]

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1. Department of Physics, Beijing Normal University, Beijing 100875 (China)
2. Interdisciplinary Center of Theoretical Studies, Chinese Academy of Sciences, P. O. Box 2735, Beijing 100080 (China)
3. Institute of Theoretical Physics, Chinese Academy of Sciences, P. O. Box 2735, Beijing 100080 (China)

The successive dynamical evolution of a Bose-Einstein condensate confined in a cylindrical well is numerically studied in the framework of the time-dependent Gross-Pitaevskii equation. Interference in the nonlinear matter wave leads to concentric density rings. The phase distribution exhibits a discontinuous sequence of plateaulike belts. Abrupt jumps in the phase between adjacent belts imply large radial superfluid velocity at the borderline. This, however, does not mean large particle current because the corresponding superfluid density is nearly zero. The density zeros along with the large gradient are identified as ring dark solitons, which have a brief lifetime before evolving into other soliton states.

• OSTI ID: 21140678
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN CONDENSATION
CURRENTS
CYLINDRICAL CONFIGURATION
DISTRIBUTION
EQUATIONS
EVOLUTION
INTERFERENCE
LIFETIME
NONLINEAR PROBLEMS
SOLITONS
SUPERFLUIDITY
TIME DEPENDENCE
VELOCITY