The resonance fluorescence of thin crystal films is studied by the method of Heitler and Ma, with the resonant interaction between the crystal and the radiation field properly taken into account in a nonperturbative way. Owing to the violation of the lattice symmetry by the thin film geometry,...

The systematic theory of multiple scattering which we gave in a previous paper is further elaborated for critical scattering. It is shown that in each order the multiple-scattering intensity near the critical point is in essence a contraction of consecutive uncorrelated single-scattering...

A self-consistent theory of an interacting many-boson system is presented in the framework of the formalism of thermodynamic Green's functions without introducing anomalous propagators referring to the concept of a restricted average or any other symmetry-breaking assumption. Depending on the...

The paper presents rigorous working equations for an automatic Wheatstone bridge employed in fluid thermal conductivity measurements by the transient hot-wire technique. Particular attention is concentrated upon the inevitable small differences between the two wires employed for the cancellation...

The relation of the linearized hydrodynamic equations to kinetic theory is discussed. We show that the theory of subdynamics provides a general framework for their derivation. This theory and the related transformation theory permit the construction of a Lyapounov functional that for the...

The purpose of this paper is to study conditions under which a system of itinerate spin-12 fermions might exhibit a macroscopic linear response to external magnetic fields after long times. Exact expressions are obtained for the nonlinear response of the magnetization and the total energy. We...

We have studied, in the case of an electron gas moving in a magnetic field,the influence of interactions with both an electric field and the defects of the medium turned on adiabatically. We show that, depending on the order of application of these interactions, the stationary electron...

The effective diffusion coefficient for a Brownian particle moving in a one-dimensional periodic potential is defined and derived via the mean time to travel one lattice spacing.

In this article we consider the problem of how to reconcile the Bose-Einstein statistics of the incident radiation field with the Fermi-Dirac statistics of the electron population in a photoconductor which is in equilibrium with the radiation field. A Langevin approach is followed, based on...

A general prescription for dynamic renormalization has been found for discrete hydrodynamics (giving equations of motion for large-cell variables from those for smaller cells). The renormalization transformation is calculated explicitly, and found to consist of purely algebraic relations among a...