Higher dimensional Gaussian-type solitons of nonlinear Schrödinger equation with cubic and power-law nonlinearities in PT-symmetric potentials

PLoS One. 2014 Dec 26;9(12):e115935. doi: 10.1371/journal.pone.0115935. eCollection 2014.

Abstract

Two families of Gaussian-type soliton solutions of the (n+1)-dimensional Schrödinger equation with cubic and power-law nonlinearities in PT-symmetric potentials are analytically derived. As an example, we discuss some dynamical behaviors of two dimensional soliton solutions. Their phase switches, powers and transverse power-flow densities are discussed. Results imply that the powers flow and exchange from the gain toward the loss regions in the PT cell. Moreover, the linear stability analysis and the direct numerical simulation are carried out, which indicates that spatial Gaussian-type soliton solutions are stable below some thresholds for the imaginary part of PT-symmetric potentials in the defocusing cubic and focusing power-law nonlinear medium, while they are always unstable for all parameters in other media.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Algorithms
  • Computer Simulation
  • Nonlinear Dynamics*
  • Normal Distribution*

Grants and funding

This work was supported by Zhejiang Province welfare project (Grant No. 2014C32006) and the Special Foundation for theoretical physics Research Program of China (Grant No. 11447124). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.