Jacobi Hamiltonian Integrators

TL;DR

This paper introduces a new method for creating structure-preserving numerical integrators for Hamiltonian systems on Jacobi manifolds, extending geometric integrator techniques to more general, dissipative, and time-dependent systems.

Contribution

It generalizes Poisson Hamiltonian Integrators to Jacobi manifolds by leveraging the correspondence with homogeneous Poisson manifolds, enabling structure preservation in broader Hamiltonian systems.

Findings

Developed a theoretical framework for Jacobi Hamiltonian Integrators.

Outlined a numerical technique compatible with Jacobi dynamics.

Extended geometric integrator methods to dissipative and time-dependent systems.

Abstract

We develop a method of constructing structure-preserving integrators for Hamiltonian systems in Jacobi manifolds. Hamiltonian mechanics, rooted in symplectic and Poisson geometry, has long provided a foundation for modeling conservative systems in classical physics. Jacobi manifolds, generalizing both contact and Poisson manifolds, extend this theory and are suitable for incorporating time-dependent, dissipative and thermodynamic phenomena. Building on recent advances in geometric integrators - specifically Poisson Hamiltonian Integrators (PHI), which preserve key features of Poisson systems - we propose a construction of Jacobi Hamiltonian Integrators. Our approach explores the correspondence between Jacobi and homogeneous Poisson manifolds, with the aim of extending the PHI techniques while ensuring preservation of the homogeneity structure. This work develops the theoretical tools required for this generalization and outlines a numerical integration technique compatible with Jacobi dynamics. { By focusing on the homogeneous Poisson perspective instead of direct contact realizations, we establish a clear pathway for constructing structure-preserving integrators for time-dependent and dissipative systems that are embedded in the Jacobi framework.