X,Y,Z-Waves: Extended Structures in Nonlinear Lattices

Details X,Y,Z-Waves: Extended Structures in Nonlinear Lattices X,Y,Z-Waves: Extended Structures in Nonlinear Lattices

2006-03-15

arxiv.org/abs/cond-mat/0603397v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevE.75.016607

Motivated by recent experimental and theoretical results on optical X-waves, we propose a new type of waveforms in 2D and 3D discrete media -- multi-legged extended nonlinear structures (ENS), built as arrays of lattice solitons (tiles or stones, in the 2D and 3D cases, respectively). First, we study the stability of the tiles and stones analytically, and then extend them numerically to complete ENS forms for both 2D and 3D lattices. The predicted patterns are relevant to a variety of physical settings, such as Bose-Einstein condensates in deep optical lattices, lattices built of microresonators, photorefractive crystals with optically induced lattices (in the 2D case) and others.

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