Bilinear approach to the quasi-periodic wave solutions of supersymmetric equations in superspace

Details Bilinear approach to the quasi-periodic wave solutions of supersymmetric equations in superspace Bilinear approach to the quasi-periodic wave solutions of supersymmetric equations in superspace

2010-01-10

arxiv.org/abs/1001.1402v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

Scientific paper

We devise a lucid and straightforward way for explicitly constructing quasi-periodic wave solutions (also called multi-periodic wave solutions) of supersymmetric equations in superspace $\mathbb{R}_\Lambda^{2,1}$ over two-dimensional Grassmann algebra $G_1(\sigma)$. Once a nonlinear equation is written in a bilinear form, its quasi-periodic wave solutions can be directly obtained by using a formula. Moreover, properties of these solutions are investigated in detail by analyzing their structures, plots and asymptotic behaviors. The relations between the quasi-periodic wave solutions and soliton solutions are rigorously established. It is shown that the soliton solutions can be obtained only as limiting cases of the quasi-periodic wave solutions under small amplitude limits in superspace $\mathbb{R}_\Lambda^{2,1}$. We find that, in contrast to the purely bosonic case, there is an interesting influencing band occurred among the quasi-periodic waves under the presence of the Grassmann variable. The quasi-periodic waves are symmetric about the band but collapse along with the band. Furthermore, the amplitudes of the quasi-periodic waves increase as the waves move away from the band. The efficiency of our proposed method can be demonstrated on a class variety of supersymmetric equations such as those considered in this paper, $\mathcal{N}=1$ supersymmetric KdV, Sawada-Kotera-Ramani and Ito's equations, as well as $\mathcal{N}=2$ supersymmetric KdV equation.

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