Variational calculations for anisotropic solitons in dipolar Bose-Einstein condensates

Details Variational calculations for anisotropic solitons in dipolar Bose-Einstein condensates Variational calculations for anisotropic solitons in dipolar Bose-Einstein condensates

2011-01-11

arxiv.org/abs/1101.2070v1

Phys. Rev. A 83, 053604 (2011)

Physics

Condensed Matter

Quantum Gases

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

Scientific paper

10.1103/PhysRevA.83.053604

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.

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