  We report and discuss the results of double-slit-like experiments in the
infrared range, which evidence an anomalous behaviour of photon systems under
particular (energy and space) constraints. These outcomes apparently disagree
both with standard quantum mechanics (Copenhagen interpretation) and with
classical and quantum electrodynamics. Possible interpretations can be given in
terms of either the existence of de Broglie-Bohm pilot waves associated to
photons, and/or the breakdown of local Lorentz invariance (LLI). We put forward
an intriguing hypothesis about the possible connection between these seemingly
unrelated points of view by assuming that the pilot wave of a photon is, in the
framework of LLI breakdown, a local deformation of the flat minkowskian
spacetime.
