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A Compact Scheme for Coupled Stochastic Nonlinear Schrödinger Equations

Part of: Infinite-dimensional Hamiltonian systems Stochastic analysis

Published online by Cambridge University Press:  05 December 2016

Chuchu Chen ,
Jialin Hong ,
Lihai Ji  and
Linghua Kong
Chuchu Chen*
Affiliation:
Institute of Computational Mathematics and Scientific/Engineering Computing, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China
Jialin Hong*
Affiliation:
Institute of Computational Mathematics and Scientific/Engineering Computing, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China
Lihai Ji*
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
Linghua Kong*
Affiliation:
School of Mathematics and Information Science, Jiangxi Normal University, Nanchang, Jiangxi 330022, China
*
*Corresponding author. Email addresses:[email protected] (C. Chen), [email protected] (J. Hong), [email protected] (L. Ji), [email protected] (L. Kong)
*Corresponding author. Email addresses:[email protected] (C. Chen), [email protected] (J. Hong), [email protected] (L. Ji), [email protected] (L. Kong)
*Corresponding author. Email addresses:[email protected] (C. Chen), [email protected] (J. Hong), [email protected] (L. Ji), [email protected] (L. Kong)
*Corresponding author. Email addresses:[email protected] (C. Chen), [email protected] (J. Hong), [email protected] (L. Ji), [email protected] (L. Kong)
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Abstract

In this paper, we propose a compact scheme to numerically study the coupled stochastic nonlinear Schrödinger equations. We prove that the compact scheme preserves the discrete stochastic multi-symplectic conservation law, discrete charge conservation law and discrete energy evolution law almost surely. Numerical experiments confirm well the theoretical analysis results. Furthermore, we present a detailed numerical investigation of the optical phenomena based on the compact scheme. By numerical experiments for various amplitudes of noise, we find that the noise accelerates the oscillation of the soliton and leads to the decay of the solution amplitudes with respect to time. In particular, if the noise is relatively strong, the soliton will be totally destroyed. Meanwhile, we observe that the phase shift is sensibly modified by the noise. Moreover, the numerical results present inelastic interaction which is different from the deterministic case.

Keywords

Coupled stochastic nonlinear Schrödinger equationscompact schemestochastic multi-symplectic conservation lawenergy evolution lawcharge conservation lawsoliton evolutionsoliton interaction

MSC classification

Secondary: 60H15: Stochastic partial differential equations 60H35: Computational methods for stochastic equations 37K05: Hamiltonian structures, symmetries, variational principles, conservation laws
Type
Research Article
Information
Communications in Computational Physics , Volume 21 , Issue 1 , January 2017 , pp. 93 - 125
Copyright
Copyright © Global-Science Press 2016 

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