Classical Simulation of Double Slit Interference via Ballistic Diffusion
  Based on a proposed classical explanation, the quantum mechanical "decay of the wave packet" is shown to simply result from sub-quantum diffusion with a specific diffusivity varying in time due to a particle's changing thermal environment. The exact quantum mechanical intensity distribution, as well as the corresponding trajectory distribution and the velocity field of a Gaussian wave packet are therewith computed. We utilize no quantum mechanics, but only familiar simulation techniques for diffusion, e.g., finite differences or coupled map lattices (CML). 
Johannes Mesa Pascasio, Siegfried Fussy, Herbert Schwabl, Gerhard   Groessing
quant-ph