ABSTRACT
The applications of the real-time Green's functions that have been discussed so far have been described in terms of being near to an equilibrium system. One of the problems with a correlated initial state is that the buildup in the correlations among the carriers leads to effects that are not present in the thermal equilibrium state. In the correlated state, there must be additional terms in the kinetic equation that insure that the set of collision integrals reduces to zero as thermal equilibrium is approached. In high electric fields, there can arise a significant interaction between the fields that drive the transport in the system and the dissipation within the system. The broadening that arises from the self-energy introduces the fact that there can be interference between the driving terms and the dissipative terms. One of the crucial considerations in transient studies is the range of the characteristic timescales that exist in the semiconductor.
