"Simple method for determining asymptotic states of fast neutrino-flavor conversion"

Masamichi Zaizen and Hiroki Nagakura
arXiv:2211.09343

These animations show the time evolution of polarization vector \( \boldsymbol{P} \) in Fig.2. They illustrate the development of a cascade from large-scale to small-scale structures in flavor wave patterns.
Top: Flavor coherence Bottom: 3rd component \( \rho_{ee}-\rho_{xx} \) of polarizatino vector
Horizontal: Spatial domain Vertical: Angular direction \( v_z = \cos\theta_{\nu} \)
In the bottom panel, the transition from red to blue color indicates a complete flavor conversion ( \( P_{ex} = 1 \) ) from electron-type to heavy-leptonic flavors.