Abstract
The two time Green function method is applied to calculate the transport coefficients of an elecron gas. The sequence of equations for the Green functions is derived, and it is shown that the results corresponding to the random phase approximation (including the exchange effects) can be obtained by terminating this sequence at the first stage. Proceeding to the second stage, one can quite naturally take the shielding effects and the plasma oscillation into account. Some discussions are made about the derivation of the kinetic equation for quantum plasma.

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