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Collisional flavor instabilities of supernova neutrinos

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arxiv 2104.11369 v2 pith:PZMLPBX4 submitted 2021-04-23 hep-ph astro-ph.HE

Lucas Johns This is my paper · ORCID
classification hep-phastro-ph.HE
keywords instabilitiescollisionalflavorneutrinosupernovaaffectantineutrinoassociated
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A lingering mystery in core-collapse supernova theory is how collective neutrino oscillations affect the dynamics. All previously identified flavor instabilities, some of which might make the effects considerable, are essentially collisionless phenomena. Here it is shown that collisional instabilities exist as well. They are associated with asymmetries between the neutrino and antineutrino interaction rates, are possibly prevalent deep inside supernovae, and pose an unusual instance of decoherent interactions with a thermal environment causing the sustained growth of quantum coherence.

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Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Neutrino flavor-wave transport: Numerical tests and theoretical challenges

    hep-ph 2026-08 conditional novelty 7.0 of 10

    Numerical tests of flavor-wave transport under slow driving show that the quasilinear and quasistatic approximations are unreliable due to wave-wave coupling and exceptional points.

  2. Local-equilibrium theory of neutrino oscillations

    hep-ph 2025-06 conditional novelty 7.0 of 10

    The authors generalize neutrino flavor-wave linear analysis to arbitrary mixing-equilibrium backgrounds and propose a kinetic-theory closure for turbulent flavor-wave viscosity.

  3. Predicting the outcome of collisional neutrino flavor conversion

    hep-ph 2025-05 conditional novelty 7.0 of 10

    Collisional neutrino flavor instabilities settle into a state at the edge of instability with nonzero flavor coherence, and explicit formulas predict this final state.

  4. Single-wave solutions of the neutrino fast flavor system. Part II. Weak instabilities and their resonant behavior

    hep-ph 2026-01 conditional novelty 6.0 of 10

    For shallow angular crossings, the nonlinear evolution of a single-wave fast flavor instability is a flavor pendulum whose amplitude and period are set by the linear growth rate.

  5. Comparative Testing of Subgrid Models for Fast Neutrino Flavor Conversions in Core-collapse Supernova Simulations

    astro-ph.HE 2025-06 conditional novelty 6.0 of 10

    A 1D supernova simulation with four-species BGK subgrid modeling shows that three-species assumptions overestimate flavor conversion and that semi-implicit time integration is the most reliable.

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