The physical quantities which occur in the laws of relativistic thermodynamics are defined as statistical expressions of relativistic kinetic theory. The role of the hydrodynamic velocity field is discussed.

The vapour-liquid equilibrium of the system argon-krypton has been investigated. The co-existing liquid and gas phases have been determined as a function of pressure and temperature. The experimental critical line is compared with theoretical results obtained from perturbation theory and the Van...

The random-walk formalism that describes correlation functions in a homogenous system is here extended to cover correlations in ordered phases of a lattice gas. The general method is illustrated by application to certain lattice gases on linear, square and honeycomb lattices, treated under the...

The Wigner function, which is commonly used as a joint distribution for non-commuting observables, is shown to be non-negative in all quantum states when smoothed with a gaussian whose variances are greater than or equal to those of the minimum uncertainty wave packet.

In this paper the calculation of the elements of the transition operator in the angular momentum representation is carried out. It is shown that these matrix elements can be expressed in terms of surface integrals over the surrounded surface in the usual case of scattering of a plane wave by an...

The compact projection technique for the derivation of the kinetic equations from the BBGKY-hierarchy is presented, which is suitable, in particular, for the description of the inhomogeneous systems. The projector (defined constructively) provides the possibility to treat the formally linear...

By using source methodologies in the Schwinger model, the spectral form for the photon Green's function and the renormalization group formalism are introduced to investigate the non-trivial eigenvalue of the effective coupling constant and its implications for dynamical mass generation.

Protracted discussions on concepts like the momentum of electromagnetic waves in matter and the pressure of sound indicate that the interpretation of the momentum balance in non-relativistic physics can be less clear than that of the energy balance. It is shown that this can be understood from...

Functional integral technique is applied to the Blume-Emery-Griffiths model (BEG) and to the Heisenberg model with crystalline field.

Molecular hydrodynamic equations derived by linear response theory for inhomogeneous systems are investigated in two extreme cases: a simple fluid in a gravitational field (an example of a long-range inhomogeneity), and a simple fluid in the presence of a rigid flat wall described by an infinite...