  The standard quantum theory has not taken into account the size of quantum
particles, the latter being implicitly treated as material points. The recent
interference experiments of Zeilinger [3] with large molecules like fullerenes
and the thought experiments of Bozic et al [7] with asymmetrical Young slits
make it possible today to take into account the particle size.
  We present here a complete study of this phenomenon where our simulations
show differences between the particles density after the slits and the modulus
square of the wave function. Then we propose a crucial experiment that allows
us to reconsider the wave-particle duality and to test the existence of the
Broglie-Bohm trajectories for indistinguishable particles.

Quantum Physics