  The neutrino oscillation patterns can be modified by neutrino interactions
with external environments including electromagnetic fields that can influence
on neutrinos in the case neutrinos have nonzero electromagnetic properties [1].
The phenomenon of neutrino oscillations can proceed only in the case of the
coherent superposition of neutrino mass states. An external environment can
modify a neutrino evolution in a way that conditions for the coherent
superposition of neutrino mass states are violated. Such a violation is called
quantum decoherence of neutrino states and leads to the suppression of flavor
neutrino oscillations [2, 3]. Note that neutrino decoherence appeared due to
the wave separation of different mass states is usually not related to quantum
neutrino decoherence, the effect that is not considered below. We consider the
neutrino quantum decoherence due to neutrino radiative decay in the presence of
an electron medium and radiation field. The corresponding damping of neutrino
oscillations is calculated.
