Heisenberg picture operators in the quantum-state diffusion model
Heinz‐Peter Breuer, Bernd Kappler, Francesco Petruccione · Journal of Physics A Mathematical and General · 1998
A stochastic simulation algorithm for the computation of multitime correlation functions which is based on the quantum-state diffusion model of open systems is developed. The crucial point of the proposed scheme is a suitable extension of the quantum master equation to a doubled Hilbert space which is then unravelled by a stochastic differential equation.