  Although neutrino-antineutrino states originating from neutral-current
interactions are blind concerning the flavor state, an oscillation pattern is
predicted provided that both neutrino and antineutrino are detected. This issue
arises from both the coherence and entanglement of the neutrino-antineutrino
states. Based on quantum resource theory, we use the l1-norm and concurrence to
quantify quantum coherence and entanglement, respectively. Considering the
localization properties by the wave packet approach and a matter potential
which appears when neutrino and antineutrino propagate in a material medium, we
obtain the l1-norm and concurrence. We see that the neutrino and antineutrino
remain entangled for larger baseline lengths when they propagate in a material
medium. In the case of the coherence property, the l1-norm decreases in
comparison to the corresponding one in vacuum. However, its damping occurs for
larger distances.
