At the heart of a dying star, as its core collapses into a neutron sphere, an invisible storm is born. Trillions of neutrinos, particles that barely interact with matter, race through the scorching plasma. There are so many of them that they begin to influence each other, changing their 'flavors' (electron, muon, tau) like chameleons. Directly calculating this chaos is a task beyond even supercomputers.
The authors found a workaround. They represented the small inhomogeneities in the neutrino field as wave-particles — flavomons. This is like describing ocean ripples not by tracking each water molecule but by looking at the waves on the surface. The idea isn't new, but this is the first time it has been tested in a numerical model under slowly changing conditions — for example, when a supernova's shock wave plows through the star.
The calculations showed that the method partially works: flavomons do carry 'flavor' where theory predicts. But two problems emerged. First, waves can collide and scatter off each other, as if ocean ripples suddenly started spawning whirlpools. Second, when energy levels get close together, flavomons start jumping between them without apparent reason: these are non-adiabatic transitions. All together, this means that a simple wave picture isn't enough.
For now, the method isn't ready for real astrophysical calculations. But it has already highlighted what's missing: scientists need to tackle nonlinear wave interactions and quantum jumps. Once these hurdles are overcome, flavomons could help us understand how neutrinos inflate a supernova explosion and scatter heavy elements like gold and uranium across the cosmos. Without this neutrino storm, our universe would be a very different place.
At the moment of a supernova's core collapse, neutrinos carry away 99% of the explosion's energy — in a few seconds, more energy is released than the Sun will emit over its entire lifetime.
In Peter Watts's novel Blindsight, an alien ship uses neutrino communication to remain undetectable.