  Using the model in which the vacuum is filled with virtual fermion pairs we
propose an effective description of photon propagation compatible with the
wave-particle duality and the quantum field theory.
  In this model the origin of the vacuum permittivity and permeability appear
naturally in the statistical description of the gas of the virtual pairs.
Assuming virtual gas in thermal equilibrium at temperature corresponding to the
Higgs field vacuum expectation value, $kT\approx246.22\, \rm{GeV}$, the deduced
value of the vacuum magnetic permeability (magnetic constant) appears on the
same order of the experimental value. One of the features that makes this model
attractive is the expected fluctuation of the speed of light propagation that
is at the level of $\sigma\approx 1.9\,\mathrm{as\,m}^{-1/2}$. This
non-classical light propagation property is reachable with the available
technologies.
