title: Relativistic pondermotive Hamiltonian for electrons in an intense laser field.
abstract: A Hamiltonian theory of the electron drift motion in an intense laser pulse is presented. The action-variational Lie perturbation method is utilized to derive the relativistic pondermotive Hamiltonian in a rigorous and systematic way. The results include: the electron drift motion in a linearly polarized pulse is slightly anisotropic because of the finite pulse duration effects, and its drift in a circularly polarized pulse contains a vortex component.
authors.affiliation: Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543, USA.
authors.forename: X
authors.initials: X
authors.lastname: Li