The Hamiltonian of interaction of liquid helium with the quantized electromagnetic field plays an important role in such phenomena as Raman scattering, excitons, and possible cooperative effects of exchange of virtual photons. This interaction has been derived from first principles by...

An asymptotic long time expansion is derived for the time dependent super Burnett coefficient which is the time derivative of the fourth cumulant of displacement of a tagged particle in a hard disk system or, alternatively, it is the ordered time integral over the cumulant of the four point...

We evaluate the surface force density induced on a sphere placed in an arbitrary nonstationary flow field of a viscous incompressible fluid for stick boundary conditions. The calculation leads to a generalization of Faxén's theorem to force multipole moments of arbitrary order.

We present detailed tabulations of the first few eigenfunctions of the hard-sphere energy scattering kernel for a test-particle in a background heat-bath. Calculations, for a range of heat bath/test particle mass-ratios between 18 and 11024, were carried out by a Rayleigh-Ritz method using the...

The group of Bogoliubov transformations of annihilation and creation operators is a subgroup of U(n,n) where n is the number of distinct pairs of annihilation and creation operators. Here, it is established that this subgroup of U(n,n) is isomorphic to Sp(2n,R), which appears in classical...

The Debye-Bueche description of the frictional properties of dilute polymer solutions is extended to semidilute solutions where the hydrodynamic interaction of two nearby molecules is significant. The method of reflections is set up as a formal iterative procedure for the calculation of the...

The interaction energy due to long range tensor forces between two protons as accurately measured in molecular H2 agrees fully with that expected from the interaction of the measured magnetic moments of the two protons. This agreement sets an upper limit on the maximum possible long range tensor...

The S-matrix-pole-representation of the second virial coefficient for short range potentials is discussed. The method is especially useful at low temperatures.

The theory of two previous papers on multiple scattering is extended to apply to scattering from critical binary mixtures. This extension leaves the essential structure of the scattering formulae unaltered.

We construct the exact solution for the time evolution of the local mass density in an ideal gas in which an external short-ranged separable potential is switched on at time t = 0. The redistribution of matter in strong potentials causing bound states or resonances is studied in great numerical...