Nonequilibrium Statistical Mechanics
Nonequilibrium Statistical Mechanics. Instructor: Professor V. Balakrishnan, Department of Physics, IIT Madras. Thermal fluctuations, Langevin dynamics, Brownian motion and diffusion, Fokker-Planck equations, linear response theory, fluctuation-dissipation relations, the Boltzmann equation, critical phenomena, scaling and critical exponents. (from nptel.ac.in)
| Lecture 07 - Linear Response Theory (Part 2) |
Equilibrium density matrix in the canonical ensemble. Time dependent perturbation of a Hamiltonian system. First-order correction to the density operator. First-order correction to the mean value of an observable. Linear, causal, retarded response. Definition of the response function.
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