SPONTANEOUS ELECTROMAGNETIC FLUCTUATIONS in A RELATIVISTIC MAGNETIZED ELECTRON-POSITRON PLASMA

Resumen

Spontaneous fluctuations are a robust phenomenon of plasmas near equilibrium, which does not depend on the existence of instabilities, and their characterization provides valuable information about the role of the relativistic temperatures $T\sim m{c}^2$ in relativistic regimes. In this paper, we study the broadband spontaneous electromagnetic fluctuations in a relativistic and magnetized pair plasma described by Maxwell–Jüttner distribution functions, based on the fluctuation-dissipation theorem and particle-in-cell simulations. It is shown that the transverse electromagnetic fluctuations are constrained by a temperature-independent critical frequency $ømeg{a}_m̊c=sqrt̊Ømeg{a}_{r}c{̊}^2+(ck{)}^2$, which separates the collisionless damping regime ($|ømega|łtømeg{a}_{r}m̊$) from the case where the waves can propagate without damping ($|ømega|gtømeg{a}_{r}m̊$). Further, relativistic simulations show an excellent agreement between analytical and numerical results. We expect this formalism to contribute to obtaining useful physical information about the state of relativistic plasmas.

Roberto E. Navarro

Profesor asistente

Doctor en Ciencias c/m Física | Académico UdeC | Investigador Física de Plasmas | Usuario Linux & amante de perros | No he visto una sola película de Star Wars

Jaime A. Araneda

Profesor titular