Anisotropic expansion of the Universe and generation of quantum
  interference in light propagation
  We investigate the electrodynamic in a Bianchi type I cosmological model.
This scenario reveals the possibility that photons, during their traveling, can
make quantum interference. This effect is only due to the presence of two
different axes of expansion in the cosmic evolution. In other word, it is
possible to conclude that a purely metrical - or, equivalently, gravitational -
phenomenon gives rise up to a quantum effect that manifests itself in the light
propagation.
