Electron propagation in a Markovian time-fluctuating medium: A dynamical generalization of the coherent-potential approximation

摘要: We present a generalization of the coherent-potential approximation which allows one to describe average propagation in disordered medium on-site potential fluctuates time according Markov process. This method appears useful discuss dynamics some manybody problems. By extending Kubo treatment motional narrowing, averages over histories are performed with use projection techniques rely on augmented-space formalism. Both binary noise and Gauss-Markov treated. The one-particle two-particle Green functions derived each case.