Skip to main content
Ir a la página de inicio de la Comisión Europea (se abrirá en una nueva ventana)
español es
CORDIS - Resultados de investigaciones de la UE
CORDIS

Instabilities and homoclinic phenomena in Hamiltonian systems

Objetivo

A fundamental problem in the study of dynamical systems is to ascertain whether the effect of a perturbation on an integrable Hamiltonian system accumulates over time and leads to a large effect (instability) or it averages out (stability). Instabilities in nearly integrable systems, usually called Arnold diffusion, take place along resonances and by means of a
framework of partially hyperbolic invariant objects and their homoclinic and heteroclinic connections.

The goal of this project is to develop new techniques, relying on the role of invariant manifolds in the global dynamics, to prove the existence of physically relevant instabilities and homoclinic phenomena in several problems in celestial mechanics and Hamiltonian Partial Differential Equations.

The N body problem models the interaction of N puntual masses under gravitational force. Astronomers have deeply analyzed the role of resonances in this model. Nevertheless, mathematical results showing instabilities along them are rather scarce. I plan to develop a new theory to analyze the transversal intersection between invariant manifolds along mean motion and secular resonances to prove the existence of Arnold diffusion. I will also apply this theory to construct oscillatory motions.

Several Partial Differential Equations such as the nonlinear Schrdinger, the Klein-Gordon and the wave equations can be seen as infinite dimensional Hamiltonian systems. Using dynamical systems techniques and understanding the role of invariant manifolds in these Hamiltonian PDEs, I will study two type of solutions: transfer of energy solutions, namely solutions that push energy to arbitrarily high modes as time evolves by drifting along resonances; and breathers, spatially
localized and periodic in time solutions, which in a proper setting can be seen as homoclinic orbits to a stationary solution.

Ámbito científico (EuroSciVoc)

Palabras clave

Programa(s)

Tema(s)

Régimen de financiación

ERC-STG - Starting Grant

Ver todos los proyectos financiados en el marco de este régimen de financiación

Convocatoria de propuestas

(se abrirá en una nueva ventana) ERC-2017-STG

Ver todos los proyectos financiados en el marco de esta convocatoria

Institución de acogida

UNIVERSITAT DE BARCELONA
Aportación neta de la UEn
€ 227 152,32
Dirección
GRAN VIA DE LES CORTS CATALANES 585
08007 Barcelona
España
Región
Este Cataluña Barcelona
Tipo de actividad
Higher or Secondary Education Establishments
Enlaces
Coste total
€ 227 152,32

Beneficiarios (2)