Distribution functions and green's functions
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A unitary transformation is indicated which makes it possible when computing a partially traced density matrix to use the method of two-time quantum Green's functions. For systems in strong nonequilibrium, an integral equation is found which describes both the initial and kinetic stages of relaxation of the density matrix of a subsystem from any initial distribution.
KeywordsDistribution Function Integral Equation Density Matrix Initial Distribution Unitary Transformation
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