中国物理B ›› 2014, Vol. 23 ›› Issue (1): 10307-010307.doi: 10.1088/1674-1056/23/1/010307

• GENERAL • 上一篇    下一篇

Oscillating multidromion excitations in higher-dimensional nonlinear lattice with intersite and external on-site potentials using symbolic computation

B. Srividyaa b, L. Kavithaa c, R. Ravichandrana, D. Gopic d   

  1. a Department of Physics, Periyar University, Salem 636 011, India;
    b Department of Physics, K.S.R. College of Engineering, Tiruchengode 637 215, India;
    c Centre for Nanoscience and Nanotechnology, Periyar University, Salem 636 011, India;
    d Department of Chemistry, Periyar University, Salem 636 011, India
  • 收稿日期:2013-06-20 修回日期:2013-08-12 出版日期:2013-11-12 发布日期:2013-11-12

Oscillating multidromion excitations in higher-dimensional nonlinear lattice with intersite and external on-site potentials using symbolic computation

B. Srividyaa b, L. Kavithaa c, R. Ravichandrana, D. Gopic d   

  1. a Department of Physics, Periyar University, Salem 636 011, India;
    b Department of Physics, K.S.R. College of Engineering, Tiruchengode 637 215, India;
    c Centre for Nanoscience and Nanotechnology, Periyar University, Salem 636 011, India;
    d Department of Chemistry, Periyar University, Salem 636 011, India
  • Received:2013-06-20 Revised:2013-08-12 Online:2013-11-12 Published:2013-11-12
  • Contact: L. Kavitha E-mail:louiskavitha@yahoo.co.in

摘要: We show by an extensive method of quasi-discrete multiple-scale approximation that nonlinear multi-dimensional lattice waves subjected to intersite and external on-site potentials are found to be governed by (N+1)-dimensional nonlinear Schrödinger (NLS) equation. In particular, the resonant mode interaction of (2+1)-dimensional NLS equation has been identified and the theory allows the inclusion of transverse effect. We apply the exponential function method to the (2+1)-dimensional NLS equation and obtain the class of soliton solutions with a purely algebraic computational method. Notably, we discuss in detail the effects of the external on-site potentials on the explicit form of the soliton solution generated recursively. Under the action of the external on-site potentials, the model presents a rich variety of oscillating multidromion patterns propagating in the system.

关键词: solitons, partial differential equations, lattice dynamics, exact solutions

Abstract: We show by an extensive method of quasi-discrete multiple-scale approximation that nonlinear multi-dimensional lattice waves subjected to intersite and external on-site potentials are found to be governed by (N+1)-dimensional nonlinear Schrödinger (NLS) equation. In particular, the resonant mode interaction of (2+1)-dimensional NLS equation has been identified and the theory allows the inclusion of transverse effect. We apply the exponential function method to the (2+1)-dimensional NLS equation and obtain the class of soliton solutions with a purely algebraic computational method. Notably, we discuss in detail the effects of the external on-site potentials on the explicit form of the soliton solution generated recursively. Under the action of the external on-site potentials, the model presents a rich variety of oscillating multidromion patterns propagating in the system.

Key words: solitons, partial differential equations, lattice dynamics, exact solutions

中图分类号:  (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

  • 03.75.Lm
02.60.Lj (Ordinary and partial differential equations; boundary value problems) 04.20.Jb (Exact solutions)