  It is well known that electron beams accelerated in solar flares can drive
two-stream instability and produce radio bursts in the solar corona as well as
in the interplanetary medium. Recent observations show that the solar wind
likely originates from nanoflare-like events near the surface of the Sun where
locally heated plasma escapes along open field lines into space. Recent
numerical simulations and theoretical studies show that electron two-stream
instability (ETSI) driven by nanoflare-accelerated electron beams can produce
the observed nanoflare-type radio bursts, the non-Maxwellian electron velocity
distribution function of the solar wind, and the kinetic scale turbulence in
solar wind. This brief review focus on the basic theoretical framework and
recent progress in the nonlinear evolution of ETSI, including the formation of
electron holes, Langmuir wave generation in warm plasma, and the nonlinear
modulation instability and Langmuir collapse. Potential applications in
heliophysics and astrophysics are discussed.
