  Dark wavefront sensing takes shape following quantum mechanics concepts in
which one is able to "see" an object in one path of a two-arm interferometer
using an as low as desired amount of light actually "hitting" the occulting
object. A theoretical way to achieve such a goal, but in the realm of wavefront
sensing, is represented by a combination of two unequal beams interferometer
sharing the same incoming light, and whose difference in path length is
continuously adjusted in order to show different signals for different signs of
the incoming perturbation. Furthermore, in order to obtain this in white light,
the path difference should be properly adjusted vs the wavelength used. While
we incidentally describe how this could be achieved in a true optomechanical
setup, we focus our attention to the simulation of a hypothetical "perfect"
dark wavefront sensor of this kind in which white light compensation is
accomplished in a perfect manner and the gain is selectable in a numerical
fashion. Although this would represent a sort of idealized dark wavefront
sensor that would probably be hard to match in the real glass and metal, it
would also give a firm indication of the maximum achievable gain or, in other
words, of the prize for achieving such device. Details of how the simulation
code works and first numerical results are outlined along with the perspective
for an in-depth analysis of the performances and its extension to more
realistic situations, including various sources of additional noise.
