This review presents methods available for calculating transport coefficients for impurity
particles in plasmas with strong long-wave MHD-type velocity and magnetic-field …

We describe the interplay of quantum and thermal fluctuations in the infinite-range
Heisenberg spin glass. This model is generalized to SU (N) symmetry, and we describe the …

We present a comprehensive study of the motion of a damped Brownian particle evolving in
a static, one dimensional gaussian random force field. We provide both a clear physical …

We discuss the superdiffusive motion of a random walk in a medium containing random
velocity fields. For a two-dimensional layered medium with y-dependent random velocities in …

The field theoretic renormalization group (RG) is applied to the problem of a passive scalar
advected by the Gaussian self-similar velocity field with finite correlation time and in the …

The relation between scalar field theories with short-range and long-range exchange or
correlations is studied. It is shown to all orders in perturbation theory that the critical …

Lévy flights, characterized by the microscopic step index f, are for f< 2 (the case of rare
events) considered in short-range and long-range quenched random force fields with …

The field theoretic renormalization group and operator product expansion are applied to the
problem of a passive scalar advected by a Gaussian nonsolenoidal velocity field with finite …

The renormalization group and operator product expansion are applied to the model of a
passive scalar quantity advected by the Gaussian self-similar velocity field with finite, and …

Although time-dependent random media with short-range correlations lead to (possibly
biased) normal tracer diffusion, anomalous fluctuations occur away from the most probable …