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Nonlinear Schr\"odinger equation in terms of elliptic and hyperelliptic $\sigma$ functions

Exactly Solvable and Integrable Systems 2024-03-15 v2 Algebraic Geometry

Abstract

It is known that the elliptic function solutions of the nonlinear Schr\"odinger equation are reduced to the algebraic differential relation in terms of the Weierstrass sigma function, [it+αu]Ψ122u2Ψ+(ΨΨ)Ψ=12(2β+α23(v))Ψ\displaystyle{ \left[-{\frak{i}}\frac{\partial}{\partial t} +\alpha \frac{\partial}{\partial u}\right]\Psi -\frac{1}{2} \frac{\partial^2}{\partial u^2}\Psi +(\Psi^* \Psi) \Psi = \frac12 (2\beta+\alpha^2-3\wp(v))\Psi }, where Ψ(u;v,t):=eαu+iβt+c\Psi(u;v, t):=\mathrm{e}^{\alpha u+{\frak{i}}\beta t+c} eζ(v)uσ(u+v)σ(u)σ(v)\displaystyle{\frac{\mathrm{e}^{-\zeta(v)u}\sigma(u+v)}{\sigma(u)\sigma(v)}}, its dual Ψ(u;v,t)\Psi^*(u; v,t), and certain complex numbers α,β\alpha, \beta and cc. In this paper, we generalize the algebraic differential relation to those of genera two and three in terms of the hyperelliptic sigma functions.

Keywords

Cite

@article{arxiv.2403.06156,
  title  = {Nonlinear Schr\"odinger equation in terms of elliptic and hyperelliptic $\sigma$ functions},
  author = {Shigeki Matsutani},
  journal= {arXiv preprint arXiv:2403.06156},
  year   = {2024}
}

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16 pages