Elementary excitations of chiral Bose-Einstein condensates

We study the collective modes of a Bose-Einstein condensate subject to an optically induced density-dependent gauge potential. The corresponding interacting gauge theory lacks Galilean invariance, yielding an exotic superfluid state. The nonlinear dynamics in the presence of a current nonlinearity a...

Full description

Saved in:
Bibliographic Details
Published inEurophysics letters Vol. 110; no. 3; pp. 36004 - p1-36004-p6
Main Authors Edmonds, M. J., Valiente, M., Öhberg, P.
Format Journal Article
LanguageEnglish
Published Les Ulis EDP Sciences, IOP Publishing and Società Italiana di Fisica 01.05.2015
IOP Publishing
Subjects
03.65.Vf
03.75.-b
67.85.De
Bose-Einstein condensates
Coupled modes
Dipoles
Elementary excitations
Fluids
Gauge theory
Invariance
Joining
Nonlinear dynamics
Nonlinearity
Oscillations
Superfluidity
Online AccessGet full text

Cover

More Information
Summary:We study the collective modes of a Bose-Einstein condensate subject to an optically induced density-dependent gauge potential. The corresponding interacting gauge theory lacks Galilean invariance, yielding an exotic superfluid state. The nonlinear dynamics in the presence of a current nonlinearity and an external harmonic trap are found to give rise to dynamics which violate Kohn's theorem; where the frequency of the dipole mode strongly depends on the strength of the mass current in the gas. The linearised spectrum reveals how the centre of mass and shape oscillations are coupled, whereas in the strongly nonlinear regime the dynamics are irregular.
Bibliography:publisher-ID:epl17091
istex:6CA34585993BE58BC495BB33EAA75EBC04CE8B02
ark:/67375/80W-WR62NZFJ-J
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/110/36004