  We compute the particle creation of a harmonic oscillator using the classical
stochastic method. This method reproduces all the vacuum expectation values in
quantum theory. We prepare the vacuum state at the initial time and evolve it
over time using Langevin equations of motion. By averaging over the ensemble,
we compute the energy of the state at the final time and determine the amount
of particles created. We verify that the particle creation agrees with
predictions from quantum theory.
