Journal
PHYSICAL REVIEW A
Volume 81, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.81.061805
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Funding
- National Natural Science Foundation of China [10672147, 10704049, 10934010]
- National Key Basic Research Special Foundation of China [2006CB921400]
- Provincial Natural Science Foundation of Shanxi [2007011007]
- German-Israeli Foundation [149/2006]
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We construct exact solutions of the Gross-Pitaevskii equation for solitary vortices, and approximate ones for fundamental solitons, in two-dimensional models of Bose-Einstein condensates with a spatially modulated nonlinearity of either sign and a harmonic trapping potential. The number of vortex-soliton (VS) modes is determined by the discrete energy spectrum of a related linear Schrodinger equation. The VS families in the system with the attractive and repulsive nonlinearity are mutually complementary. Stable VSs with vorticity S >= 2 and those corresponding to higher-order radial states are reported, in the case of the attraction and repulsion, respectively.
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