Many-Body Simulations of the Fast Flavor Instability
arXiv:2507.02040 · doi:10.1103/d6w8-7j9s
Abstract
The neutrino fast flavor instability dominates the evolution of neutrino flavor within the engines of core-collapse supernovae and neutron star mergers. However, theoretical models of neutrino flavor change that include many-body quantum correlations can differ starkly from similar mean-field calculations. We demonstrate for the first time that the inhomogeneous fast flavor instability is disrupted by many-body correlations using a novel tensor network framework that allows a continuous transition between mean-field and many-body results by tuning the singular value decomposition cutoff value. Generalizing the forward-scattering Hamiltonian to spatially varying conditions, we demonstrate that the timescale of flavor transformation scales logarithmically with system size, suggesting that many-body effects could occur before mean-field instabilities are able to saturate. Our results have significant implications for astrophysical explosion dynamics, nucleosynthesis, and observable neutrino signatures.
Accepted for publication as a Letter in Physical Review D
References in corpus (34)
- The density-matrix renormalization group in the age of matrix product states
- Matrix Product States, Projected Entangled Pair States, and variational renormalization group methods for quantum spin systems
- The multi-angle instability in dense neutrino systems
- Fast neutrino flavor conversions near the supernova core with realistic flavor-dependent angular distributions
- Neutrino-Neutrino Interactions and Flavor Mixing in Dense Matter
- Imprints of neutrino-pair flavor conversions on nucleosynthesis in ejecta from neutron-star merger remnants
- Neutrino Fast Flavor Conversions in Neutron-star Post-Merger Accretion Disks
- Self-induced suppression of collective neutrino oscillations in a supernova
- Fast Neutrino Flavor Conversions can Help and Hinder Neutrino-Driven Explosions
- Neutrino transport in general relativistic neutron star merger simulations
- A change of direction in pairwise neutrino conversion physics: The effect of collisions
- Neutrino Flavor Conversions in High-Density Astrophysical and Cosmological Environments
- Core Collapse Supernova Gravitational Wave Emission for Progenitors of 9.6, 15, and 25 Solar Masses
- The Future of Solar Neutrinos
- The Fast Flavor Instability in Hypermassive Neutron Star Disk Outflows
- Entanglement and Many-Body effects in Collective Neutrino Oscillations
- Spectral splits and entanglement entropy in collective neutrino oscillations
- Neutrinos and nucleosynthesis of elements
- Spurious instabilities in multiangle simulations of collective flavor conversion
- Multi-Neutrino Entanglement and Correlations in Dense Neutrino Systems
- Dynamical Phase Transitions in models of Collective Neutrino Oscillations
- Collisional and Fast Neutrino Flavor Instabilities in Two-dimensional Core-collapse Supernova Simulation with Boltzmann Neutrino Transport
- Entanglement and correlations in fast collective neutrino flavor oscillations
- Neutrino Oscillations in Core-Collapse Supernovae and Neutron Star Mergers
- Classical and Quantum Evolution in a Simple Coherent Neutrino Problem
- Neutrino fast flavor oscillations with moments: linear stability analysis and application to neutron star mergers
- Entanglement in three-flavor collective neutrino oscillations
- Fast flavor conversions at the edge of instability in a two-beam model
- Do we have enough evidence to invalidate the mean-field approximation adopted to model collective neutrino oscillations?
- Collective neutrino oscillations and heavy-element nucleosynthesis in supernovae: exploring potential effects of many-body neutrino correlations
- Once-in-a-lifetime encounter models for neutrino media: From coherent oscillations to flavor equilibration
- Neutrino many-body correlations
- Many-body collective neutrino oscillations: recent developments
- Exploring entanglement and spectral split correlations in three-flavor collective neutrino oscillations