4 papers
Vortex stabilization in a small rotating asymmetric Bose-Einstein condensate
Marion Linn, Matthias Niemeyer, Alexander L. Fetter
We use a variational method to investigate the ground-state phase diagram of a small, asymmetric Bose-Einstein condensate with respect to the dimensionless interparticle interactio…
Small-amplitude normal modes of a vortex in a trapped Bose-Einstein condensate
Marion Linn, Alexander L. Fetter
We consider a cylindrically symmetric trap containing a small Bose-Einstein condensate with a singly quantized vortex on the axis of symmetry. A time-dependent variational Lagrangi…
Stability of a vortex in a small trapped Bose-Einstein condensate
Marion Linn, Alexander L. Fetter
A second-order expansion of the Gross-Pitaevskii equation in the interaction parameter determines the thermodynamic critical angular velocity Omega_c for the creation of a vortex i…
Is a Trapped One-Dimensional Bose Gas a Luttinger Liquid?
H. Monien, M. Linn, N. Elstner
The low-energy fluctuations of a trapped, interacting quasi one-dimensional Bose gas are studied. Our considerations apply to experiments with highly anisotropic traps. We show tha…