Quantum Statistics and the Many-Body Problem

The present volume represents the great majority of the papers presented on Sanibel Island at the first Symposium on Quantum Statistics and Many-Body Problems (January 26-29, 1975). In his Introductory Remarks, Professor Lawdin outlines the history of the original Symposia, and the genesis of the conference whose papers comprise this volume. We join him in his expression of thanks, and note, additionally, our gratitude to him and to Professors N. Y. Ohrn, J. R. Sabin, E. D. Adams, and John Daunt. The papers are grouped somewhat differently from their order of presentation. It seemed convenient to begin with the six papers which deal with sound propagation in one form or another, then have a two-paper diversion into solid Helium. The SHe superf1uid theme is picked up again with four papers on spin dynamics, orbit waves, etc., followed by a selection of five papers on a variety of experimental and theoretical aspects of the SHe superf1uid problem. Work in the areas of films, mono1ayers, and mixtures is presented next, followed by two papers on liquid He. We conclude with a selection of six papers on other quantum fluids and general statistical mechanics. We are most grateful to the contributors to this volume for their patience and cooperation; they have had as editors three utter novices! We have learned much, both scientifically and editorially. We hope that this volume will be of at least some help to others as well.

Table of Contents:
Attenuation and Dispersion of First Sound Near The Superfluid Transition of Liquid Helium.- Hydrodynamic Theory of Fourth Sound in a Moving Superfluid -A Discussion of Size Effects.- Theory of Sound Absorption in The Superfluid Phases of3He.- Sound Propagation and Anisotropy in Liquid 3He A.- Sound Propagation in Normal and Superfluid3He.- Phonon Propagation in Liquid and Solid Helium.- Thermal Boundary Resistance Between Solid 3He and Cerium Magnesium Nitrate.- Nuclear Spin Ordering of Solid 3He in a Magnetic Field.- Theoretical Search for Collisionless Orbit Waves.- Spin Dynamics in Superfluid3He.- Spin Waves and Magnetization Oscillation in Superfluid 3He.- Dissipative Processes in The Nuclear Magnetic Resonances of Superfluid Liquid 3He.- Hydromagnetic Effects in Superfluid 3He.- Superfluid Density of 3He.- Comments on The Josephson Plasma Resonance in 3He(A).- Free Energy Functionals for Superfluid 3He.- Fluctuations Above the Superfluid Transition in Liquid 3He..- Excitations in DIlute 3He-4He MIXTURES.- Ripplons and Superfluidity in 3He MONOLAYERS.- Film Thickness Determinations In moving Saturated Superfluid 4He Films.- Recent Experiments on The Surface of Liquid 4He: Elastic Scattering of 4He Atoms.- Thermal Expansion Coefficient and Universality Near the Superfluid Transition of 4He Under Pressure.- Bogoliubov’s Compensation of Dangerous Diagrams and The Excitation Spectrum of He II.- Electron-Hole Droplets in Germanium and Silicon.- Superfluidity in Neutron Stars.- The Hot Interacting Neutron Gas.- A General Theory for Super Phenomena in Physics.- C-Number Representation for Multilevel Systems and The Quantum — Classical Correspondence.- Nonzero Temperature Variational Principle Applied to Low Temperature Liquid Sodium.- List of Contributors.