Publication
Title
Collective excitation frequencies of bosons in a parabolic potential with interparticle harmonic interactions
Author
Abstract
The fact that the ground-state first-order density matrix for bosons in a parabolic potential with interparticle harmonic interactions is known in exact form is here exploited to study collective excitations in the weak-coupling regime. Oscillations about the ground-state density are treated analytically by a linearized equation of motion which includes a kinetic energy contribution. We show that the dipole mode has the frequency of the bare trap, in accord with the Kohn theorem, and derive explicit expressions for the frequencies of the higher-multipole modes in terms of a frequency renormalized by the interactions. (C) 2000 Elsevier Science B.V. All rights reserved.
Language
English
Source (journal)
Physics letters: A. - Amsterdam, 1967, currens
Publication
Amsterdam : 2000
ISSN
0375-9601
Volume/pages
267:5-6(2000), p. 416-419
ISI
000086704100019
Full text (Publishers DOI)
Full text (publishers version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 03.01.2013
Last edited 23.03.2017
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