Publication
Title
Roton excitations in Bose-Einstein condensates and a fluid-solid transition
Author
Abstract
Several authors have recently discussed the existence of roton excitations in Bose - Einstein condensates (BECs) and considered how a roton dip in the dispersion curve of elementary excitations may be related to the formation of a spatially modulated ground state. Here attention is drawn to a theoretical study of Minguzzi et al. on interatomic correlations in a BEC from dipole - dipole interactions induced by laser light of increasing intensity. Attractive interactions in superfluid He-4 and repulsive interactions in 'untuned' BECs are then compared and contrasted, the experiments of Woods and Cowley and of Greiner et al. providing the focus respectively. It is stressed that, contrary to a very recent assertion by Nazario and Santiago, 4 He is crucially different from BECs at the lowest temperatures.
Language
English
Source (journal)
Physics and chemistry of liquids. - London
Publication
London : 2005
ISSN
0031-9104
Volume/pages
43:5(2005), p. 423-427
ISI
000232966200002
Full text (Publisher's DOI)
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 27.11.2017
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