  It is shown that neutrino oscillation processes can be consistently described
in the framework of quantum field theory. Namely, the oscillating electron
survival probabilities in experiments with neutrino detection by
charged-current and neutral-current interactions are calculated in the quantum
field-theoretical approach to neutrino oscillations based on a modification of
the Feynman propagator. The approach is most similar to the standard Feynman
diagram technique in the momentum representation. It is found that the
oscillating distance-dependent probabilities of detecting an electron in
experiments with neutrino detection by charged-current and neutral-current
interactions exactly coincide with the corresponding probabilities calculated
in the standard approach.
