Hamiltonian systems on almost cosymplectic manifolds

TL;DR

This paper extends Hamiltonian vector field theory to almost cosymplectic manifolds, generalizing contact Hamiltonian systems, and applies it to equations of motion on a five-dimensional manifold related to the Jacobi group.

Contribution

It introduces a generalized Hamiltonian framework on almost cosymplectic manifolds and applies it to complex equations of motion on a specific five-dimensional manifold.

Findings

Derived Hamiltonian vector fields on almost cosymplectic manifolds.

Extended equations of motion on the extended Siegel-Jacobi upper-half plane.

Connected generalized structures to Riccati equations in a geometric context.

Abstract

We determine the Hamiltonian vector field on an odd dimensional manifold endowed with almost cosymplectic structure. This is a generalization of the corresponding Hamiltonian vector field on manifolds with almost transitive contact structures, which extends the contact Hamiltonian systems. Applications are presented to the equations of motion on a particular five-dimensional manifold, the extended Siegel-Jacobi upper-half plane $\tilde{\mathcal{X}}^J_1$. The $\tilde{\mathcal{X}}^J_1$ manifold is endowed with a generalized transitive almost cosymplectic structure, an almost cosymplectic structure, more general than transitive almost contact structure and cosymplectic structure.The equations of motion on $\tilde{\mathcal{X}}^J_1$ extend the Riccati equations of motion on the four-dimensional Siegel-Jacobi manifold $\mathcal{X}^J_1$ attached to a linear Hamiltonian in the generators of the real Jacobi group $G^J_1(\mathbb{R})$.