Variational calculations for anisotropic solitons in dipolar Bose-Einstein condensates

Abstract

We present variational calculations using a Gaussian trial function to calculate the ground state of the Gross-Pitaevskii equation and to describe the dynamics of the quasi-two-dimensional solitons in dipolar Bose-Einstein condensates. Furthermore we extend the ansatz to a linear superposition of Gaussians improving the results for the ground state to exact agreement with numerical grid calculations using imaginary time and split-operator method. We are able to give boundaries for the scattering length at which stable solitons may be observed in an experiment. By dynamical calculations with coupled Gaussians we are able to describe the rather complex behavior of the thermally excited solitons. The discovery of dynamically stabilized solitons indicates the existence of such BECs at experimentally accessible temperatures.

12 pages, 11 figures, submitted to Phys. Rev. A

References in corpus (8)

• Bose-Einstein condensation of chromium
• Anisotropic solitons in dipolar Bose-Einstein Condensates
• All-Optical Production of Chromium Bose-Einstein Condensates
• Variational methods with coupled Gaussian functions for Bose-Einstein condensates with long-range interactions. II. Applications
• Variational methods with coupled Gaussian functions for Bose-Einstein condensates with long-range interactions. I. General concept
• Time propagation of constrained coupled Gaussian wave packets
• Fictitious time wave packet dynamics: I. Nondispersive wave packets in the quantum Coulomb problem
• Fictitious time wave packet dynamics: II. Hydrogen atom in external fields