The hydrodynamic equations for an easy-plane (planar) ferromagnet are derived by analogy with the hydrodynamics of liquid helium. The relaxation of the magnitude of an order parameter is taken into account.

In this paper the basic relations for describing the electronic structure of linear models for monatomic and diatomic disordered systems are derived using a F.E.N. theoretical approach. Elegant three terms recurrence formulae between the wavefunctions at three successive atomic sites are...

It is shown that the macroscopic current density and energy-momentum density of a neutrino-antineutrino system may be expressed in terms of moments of two scalar Wigner functions, provided that the system is homogeneous on the scale of the de Broglie wavelength of the particles. The equilibrium...

In this paper we present a method for predicting the composition dependence of the thermal conductivity of dense gas mixtures. The method requires the knowledge of the thermal conductivities of the pure component gases at high density, of the zero-density values of the thermal conductivities...

A dynamical treatment of Markovian diffusion is presented and several applications discussed. The stochastic interpretation of quantum mechanics is considered within this framework. A model for Brownian movement which includes second order quantum effects is derived.

A modified Green's function determination of the conduction and insulator limit conductivities of the one-dimensional, half-filled band, Hubbard model is presented in a simplified version to avoid the difficulties which are encountered in some instances in utilizing commutator Green's functions...

Green's functions for systems of non-interacting particles at T=0 are obtained through ab initio calculations using functional integral algorithms. It is shown in detail how the correct Green's functions are computed and how one recovers the structure of the ground state (which in the usual...

The Langevin equations for the linear and angular velocities of a non-spherical Brownian particle are derived from the equations governing fluctuating hydrodynamics. Arbitrary slip boundary conditions are used at the surface of the particle. It is shown that it is essential to include a random...

The coefficient of shear viscosity of fluid oxygen has been determined at temperatures from 75 to 300 K at pressures up to 34 MPa with a torsionally oscillating quartz crystal. The estimated accuracy and precision of these measurements are 2% and 0.5%, respectively. Dilute gas viscosities and...

Bilinear response theory is extended and applied to a fluid of non-spherical molecules in a gravitational field and with time independent different temperatures on its upper and lower boundaries. The spectral line-shape of the depolarized component in a light-scattering experiment is worked out....