Coupled circularly polarized electromagnetic soliton states in magnetized plasmas

G. P. Veldes, N. Lazarides, D. J. Frantzeskakis, I. Kourakis

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The interaction between two co-propagating electromagnetic pulses in a magnetized plasma is considered, from first principles, relying on a fluid-Maxwell model. Two circularly polarized wavepackets by same group velocities are considered, characterized by opposite circular polarization, to be identified as left-hand- or right hand circularly polarized (i.e. LCP or RCP, respectively). A multiscale perturbative technique is adopted, leading to a pair of coupled nonlinear Schrödinger-type (NLS) equations for the modulated amplitudes of the respective vector potentials associated with the two pulses. Systematic analysis reveals the existence, in certain frequency bands, of three different types of vector soliton modes: an LCP-bright/RCP-bright coupled soliton pair state, an LCP-bright/RCP-dark soliton pair, and an LCP-dark/RCP-bright soliton pair. The value of the magnetic field plays a critical role since it determines the type of vector solitons that may occur in certain frequency bands and, on the other hand, it affects the width of those frequency bands that are characterized by a specific type of vector soliton (type). The magnetic field (strength) thus arises as an order parameter, affecting the existence conditions of each type of solution (in the form of an envelope soliton pair). An exhaustive parametric investigation is presented in terms of frequency bands and in a wide range of magnetic field (strength) values, leading to results that may be applicable in beam-plasma interaction scenarios as well as in space plasmas and in the ionosphere.

    Original languageBritish English
    Pages (from-to)9477-9494
    Number of pages18
    JournalNonlinear Dynamics
    Volume112
    Issue number11
    DOIs
    StatePublished - Jun 2024

    Keywords

    • Circularly polarized waves
    • Coupled NLS equation
    • Magnetized plasma model
    • Multiscale perturbative technique
    • Vector solitons

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