Collective excitation of Bose-Einstein condensates in the transition region between three and one dimensions

Journal Article · Tue Nov 15 00:00:00 EST 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.72.0· OSTI ID:20786577

Kottke, M; Schulte, T; Hellweg, D; Drenkelforth, S; Ertmer, W; Arlt, J J ^[1]; Cacciapuoti, L ^[2]

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1. Institut fuer Quantenoptik, Universitaet Hannover, Welfengarten 1, 30167 Hannover (Germany)
2. ESA Research and Scientific Support Department, ESTEC, Keplerlaan 1 - P.O. Box 299, 2200 AG Noordwijk ZH (Netherlands)

We measure the frequency of the low m=0 quadrupolar excitation mode of weakly interacting Bose-Einstein condensates in the transition region from the three-dimensional (3D) to the 1D mean-field regime. Various effects shifting the frequency of the mode are discussed. In particular we take the dynamic coupling of the condensate with the thermal component at finite temperature into account using a time-dependent Hartree-Fock-Bogoliubov treatment developed by Giorgini [Phys. Rev. A, 61, 063615 (2000)]. We show that the frequency rises in the transition from 3D to 1D, in good agreement with the theoretical prediction of Menotti and Stringari [Phys. Rev. A 66, 043610 (2002)].

• OSTI ID: 20786577
• Journal Information: Physical Review. A, Vol. 72, Issue 5; Other Information: DOI: 10.1103/PhysRevA.72.053631; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BOSE-EINSTEIN CONDENSATION
COLLECTIVE EXCITATIONS
COUPLING
HARTREE-FOCK-BOGOLYUBOV THEORY
MEAN-FIELD THEORY
THREE-DIMENSIONAL CALCULATIONS
TIME DEPENDENCE