The European Physical Journal D

, Volume 50, Issue 3, pp 317–323

Stabilization of two-dimensional solitons and vortices against supercritical collapse by lattice potentials

Nonlinear Dynamics

DOI: 10.1140/epjd/e2008-00239-3

Cite this article as:
Driben, R. & Malomed, B. Eur. Phys. J. D (2008) 50: 317. doi:10.1140/epjd/e2008-00239-3

Abstract

It is known that optical-lattice (OL) potentials can stabilize solitons and solitary vortices against the critical collapse, generated by cubic attractive nonlinearity in the 2D geometry. We demonstrate that OLs can also stabilize various species of fundamental and vortical solitons against the supercritical collapse, driven by the double-attractive cubic-quintic nonlinearity (however, solitons remain unstable in the case of the pure quintic nonlinearity). Two types of OLs are considered, producing similar results: the 2D Kronig-Penney “checkerboard”, and the sinusoidal potential. Soliton families are obtained by means of a variational approximation, and as numerical solutions. The stability of all families, which include fundamental and multi-humped solitons, vortices of oblique and straight types, vortices built of quadrupoles, and supervortices, strictly obeys the Vakhitov-Kolokolov criterion. The model applies to optical media and BEC in “pancake” traps.

PACS

03.75.Lm Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations 05.45.Yv Solitons 42.65.Tg Optical solitons; nonlinear guided waves 42.70.Nq Other nonlinear optical materials; photorefractive and semiconductor materials 

Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  1. 1.Laboratoire de Photonique Quantique et Moléculaire, CNRS, École Normale Supérieure de Cachan, UMR 8537CachanFrance
  2. 2.Department of Physical ElectronicsSchool of Electrical Engineering, Faculty of EngineeringTel AvivIsrael