Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities

Understand

Slow flavor evolution (defined as driven by neutrino masses and not necessarily ``slow'') is receiving fresh attention in the context of compact astrophysical environments.

• In Part~I of this series, we have studied the slow-mode dispersion relation following our recently developed analogy to plasma waves.
• The concept of resonance between flavor waves in the linear regime and propagating neutrinos is the defining feature of this approach.
• It is best motivated for weak instabilities, which probably is the most relevant regime in self-consistent astrophysical environments because these will try to eliminate the cause of instability.