Drift lagrangian for a relativistic particle in an intense laser field

I. Y. Dodin, N. J. Fisch, G. M. Fraiman

Research output: Contribution to journalArticle

15 Scopus citations


The Lagrangian and Hamiltonian functions describing the average motion of a relativistic particle under the action of a slightly inhomogeneous intense laser field are obtained. In weak low-frequency background fields, such a particle on average drifts with an effective relativistically invariant mass, which depends on the laser intensity. The essence of the proposed ponderomotive formulation is presented in a physically intuitive and mathematically simple form yet represents a powerful tool for studying various nonlinear phenomena caused by the interaction of currently available smooth ultraintense laser pulses with plasmas.

Original languageEnglish (US)
Pages (from-to)202-206
Number of pages5
JournalJETP Letters
Issue number4
StatePublished - Dec 1 2003

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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