An application is made of the Generator Coordinate Method to a system of permions interacting with bosons. The problem treated in the present work is the collective dynamics of a metal regarded as an electron system interacting dynamically with the phonons of the lattice. A generalization of the...

It is shown that the thermodynamic quantities and spin correlation functions of the classical Heisenberg model on a linear chain are expressed in terms of the eigenvalue with the smallest absolute value and the corresponding eigenfunction of a homogeneous linear integral equation, where the...

The Fokker-Planck equation is obtained using the matrix representation of the Liouville equation introduced by Balescu in the general theory of irreversible processes developed by the Brussels group. It is shown that the phenomenological equation is valid when the mass and density of the...

It is shown that even in single scattering approximation, the light scattered by a simple fluid exhibits a depolarized component which arises from including additional terms in the current density. A new way of measuring the shear viscosity of a fluid is proposed.

The second and third virial coefficients of polar gases have been calculated for a set of force parameters which has been found suitable to explain the dilute gas viscosity data. The influence of a large number of orientation dependent pair- and three-body nonadditive interactions have been...

We consider the diffusion of two species of spherically symmetric macromolecules in solution under the influence of short range central pair potential interactions as well as two body hydrodynamic interactions. Starting from the N-particle Smoluchowski equation and using Felderhof's approach we...

The ground-state energy of a low-density hard-disk bose gas is analysed with a variational calculation. An upper bound, using a Jastrow trial function, and a lower bound are obtained which show the same leading functional dependence and hence the dependence of the lead term in the ground-state...

The concept of distributive process, recently developed as a description of systems which evolve through ‘random’ energy-transfer in binary collision complexes4) is here extended to the case of energy quanta exchanged similarly between discrete, degenerate internal energy-levels. A...

A derivation of the phenomenological Langevin equation for the momentum of a brownian particle from the generalized Langevin equation of Mori is presented. This derivation requires a detailed examination of the Mori friction kernel (or memory function). It is demonstrated, on the basis of prior...

We present a method for the computation of the composition dependence of the viscosity of a dense gas mixture. This method uses the (modified) Enskog theory formula for the viscosity of a dense mixture of rigid-sphere gases, as obtained by Thorne, and assumes that this formula can be applied to...