The two-state model (TSM) with the anomalous long-tailed transition kinetics is analyzed. The TSM relaxation kinetics is found to have some peculiarities. The diffusion TSM, in which a probe particle is assumed to diffuse in both states but with different diffusion coefficients, is also...

Kinetic equations for the one-particle spin density matrix for a system of magnetic molecules in a liquid interacting with one another through intermolecular spin-spin forces are derived under the following assumptions: a) “internal” relaxation processes are ignored: b) at t = 0 the entire...