Nonextensive Tsallis statistics in Unruh effect for Dirac neutrinos

Abstract Flavor mixing of quantum fields was found to be responsible for the breakdown thermality Unruh effect. Recently, this result revisited in context nonextensive Tsallis thermostatistics, showing that emergent vacuum condensate can still featured as a thermal-like bath, provided underlying statistics is assumed obey prescription. This analyzed explicitly bosons. Here we extend study Dirac fermions and particular neutrinos. Working relativistic approximation, provide an effective description modified spectrum terms q -generalized statistics, -entropic index being dependent on parameters $$\sin \theta $$ sin θ $$\Delta m$$ Δ m . As opposed bosons, find $$q>1$$ q > 1 , which indicative subadditivity regime entropy. An intuitive understanding discussed relation nontrivial entangled structure exhibited by mixed fields, combined with Pauli exclusion principle.