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math-ph2025

Variational Dissipative Mechanics on Lie Algebroids

Alexandre Anahory Simoes, Leonardo Colombo

We formulate a Herglotz-type variational principle on a Lie algebroid and derive the corresponding Euler--Lagrange--Herglotz equations for a Lagrangian depending on an additional s…

math-ph2025

Lindblad Quantum Dynamics as Euler-Poincaré Reduction on Adjoint-Coupled Semidirect Products

Leonardo Colombo

We present a geometric and variational derivation of the Gorini--Kossakowski--Sudarshan--Lindblad equation from Euler--Poincar'e reduction on an adjoint--coupled semidirect product…

math-ph2025

A Presymplectic and Symmetry Reduced Formulation of the Maxwell Vlasov System

Leonardo Colombo

We develop a unified geometric formulation of the Maxwell-Vlasov system using the infinite-dimensional Skinner-Rusk (SR) formalism. In this framework, particles and fields are trea…

math-ph2025

Reduction of hybrid Hamiltonian systems with non-equivariant momentum maps

Leonardo Colombo, María Emma Eyrea Irazú, María Eugenia García +2

We develop a reduction scheme à la Marsden-Weinstein-Meyer for hybrid Hamiltonian systems. Our method does not require the momentum map to be equivariant, neither to be preserved b…

math-ph2025

Homogeneous bi-Hamiltonian structures and integrable contact systems

Leonardo Colombo, Manuel de León, María Emma Eyrea Irazú +1

Bi-Hamiltonian structures can be utilised to compute a maximal set of functions in involution for certain integrable systems, given by the eigenvalues of the recursion operator rel…