Another look at synchronized neutrino oscillations
arXiv:1601.07842 · doi:10.1016/j.nuclphysb.2016.02.011
Abstract
In dense neutrino backgrounds present in supernovae and in the early Universe neutrino oscillations may exhibit complex collective phenomena, such as synchronized oscillations, bipolar oscillations and spectral splits and swaps. We consider in detail possible decoherence effects on the simplest of these phenomena -- synchronized neutrino oscillations that can occur in a uniform and isotropic neutrino gas. We develop an exact formalism of spectral moments of the flavour spin vectors describing such a system and then apply it to find analytical approaches that allow one to study decoherence effects on its late-time evolution. This turns out to be possible in part due to the existence of the (previously unknown) exact conservation law satisfied by the quantities describing the considered neutrino system. Interpretation of the decoherence effects in terms of neutrino wave packet separation is also given, both in the adiabatic and non-adiabatic regimes of neutrino flavour evolution.
LaTeX, 32 pages, 3 figures. V2: minor textual changes, references and an acknowledgement added, results and conclusions unchanged
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Cited by in corpus (15)
- Self-induced neutrino flavor conversion without flavor mixing
- Fast oscillations, collisionless relaxation, and spurious evolution of supernova neutrino flavor
- Dynamics of fast neutrino flavor conversions with scattering effects: a detailed analysis
- Dynamical Phase Transitions in models of Collective Neutrino Oscillations
- Neutrino Flavor Evolution in Neutron Star Mergers
- Robust measurement of supernova spectra with future neutrino detectors
- Quantum information and quantum simulation of neutrino physics
- Self-induced temporal instability from a neutrino antenna
- Bichromatic synchronized chaos in coupled optomechanical nanoresonators
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- An optimization-based approach to calculating neutrino flavor evolution
- Coherence of oscillations in matter and supernova neutrinos
- Neutrino dispersion relation in a magnetized multi-stream matter background
- Chiral spin-3/2 particles in a medium
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