On the quantum dissipative generator: weak-coupling approximation and stochastic approach
Adrián A. Budini, Ana Karina Chattah, Manuel O. Cáceres · Journal of Physics A Mathematical and General · 1999
For a quantum open system the so-called Schrödinger-Langevin picture has been revisited. In a second-order perturbation it is shown that a non-Markovian evolution for the stochastic state vector leads to a dissipative generator which has a Kossakowski-Lindblad form. In this context it is possible to analyse the completely positive condition. The equivalence of this picture with the trace-out technique in the weak coupling approximation has been proved.