Response theory and reduced equations of motion.
Nonlinear response theory for a relaxation experiment is used to derive classical and quantum-mechanical equations of motion for reduced distribution functions or density matrices, respectively. The classical equations are linear, but the quantum ones are not. The results are analyzed in the weak-coupling and separation-of-time-scales limits.
Ronis
David
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Department of Chemistry, McGill University, 801 Sherbrooke West, Montreal, Quebec, Canada H3A 2K6.