Published November 2006 | Version v1
Journal article Metadata-only

Collective excitations of a Bose-Einstein condensate in an anharmonic trap

Creators

  • 1. Physics and Electronics Engineering College, Northwest Normal University, 730070 Lanzhou (China)
  • 2. Institute of Applied Physics and Computational Mathematics, P. O. Box 8009 (28), 100088 Beijing (China)
  • 3. Key Laboratory for Quantum Information and Measurements, Ministry of Education, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871 (China)

Description

We investigate the collective excitations of a one-dimensional Bose-Einstein condensate with repulsive interaction between atoms in a quadratic plus quartic trap. Using variational approaches, the coupled equations of motions for the center-of-mass coordinate of the condensate and its width are derived. Then, two low-energy excitation modes are obtained analytically. The frequency shift induced by the anharmonic distortion, and the collapse and revival of the collective excitations originating from the nonlinear coupling between the two modes, are discussed

Additional details

Identifiers

DOI
10.1103/PhysRevA.74.055601;
arXiv
arXiv:cond-mat/0607361v3;

Publishing Information

Journal Title
Physical Review. A
Journal Volume
74
Journal Issue
5
Journal Page Range
p. 055601-055601.4
ISSN
1050-2947
CODEN
PLRAAN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39004286
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
ATOMS; BOSE-EINSTEIN CONDENSATION; CENTER-OF-MASS SYSTEM; COLLECTIVE EXCITATIONS; COUPLING; EQUATIONS OF MOTION; INTERACTIONS; NONLINEAR PROBLEMS; ONE-DIMENSIONAL CALCULATIONS; SPECTRAL SHIFT; TRAPS; VARIATIONAL METHODS
Descriptors DEC
CALCULATION METHODS; DIFFERENTIAL EQUATIONS; ENERGY-LEVEL TRANSITIONS; EQUATIONS; EXCITATION; PARTIAL DIFFERENTIAL EQUATIONS

Optional Information

Notes
(c) 2006 The American Physical Society