 Nelson’s (1966, 1985) stochastic mechanics is a proposal to recover the wave function and the Schrödinger equation as effective elements in the description of a fundamental diffusion process in configuration space. Insofar as the proposal is  successful,[37]  it shares many features with de Broglie–Bohm theory. Indeed, the current velocity for the particles in Nelson’s theory turns out to be equal to the de Broglie–Bohm velocity, and the particle distribution in Nelson’s theory is equal to that in de Broglie–Bohm theory (in equilibrium).