Explicit solutions for a (2+1)-dimensional Toda-like chain

TL;DR

This paper derives explicit solutions for a (2+1)-dimensional Toda-like chain, a complex integrable system related to several well-known lattice models, using Hirota's method and theta-function identities.

Contribution

It provides explicit bilinear equations and solutions for the (2+1)-dimensional Toda-like chain within the Ablowitz-Ladik hierarchy framework.

Findings

Derived Toeplitz, dark-soliton, and quasiperiodic solutions.

Connected solutions to the two-dimensional Volterra chain.

Extended integrable systems understanding.

Abstract

We consider a (2+1)-dimensional Toda-like chain which can be viewed as a two-dimensional generalization of the Wu-Geng model and which is closely related to the two-dimensional Volterra, two-dimensional Toda and relativistic Toda lattices. In the framework of the Hirota direct approach, we present equations describing this model as a system of bilinear equations that belongs to the Ablowitz-Ladik hierarchy. Using the Jacobi-like determinantal identities and the Fay identity for the theta-functions, we derive its Toeplitz, dark-soliton and quasiperiodic solutions as well as the similar set of solutions for the two-dimensional Volterra chain.