Table of Contents

Introduction 1: Dynamic response functions 2: Physics of solid helium 3: Dynamic structure factor of solid helium 4: Self consistent phonon theory 5: Neutron studies of solid helium 6: Introduction to liquid 4He 7: Microscopic picture 8: Historical development of ideas 9: Observed properties of liquid 4He 10: Theory of liquid 4He 11: Nature of excitations in liquid 4He 12: Excitations in liquid 3He 13: Dynamic susceptibility of liquid 3He 14: Approximations to the dynamic susceptibility 15: Models of S(Q,omega) in liquid 3He 16: Mori and kinetic theories of liquid 3He 17: The impulse approximation 18: Final state contributions 19: Intermediate and high momentum transfer 20: Recent monographs and conference proceedings References Appendices A-C

Reviews

`a fine addition to the literature. It belongs on the bookshelf of anyone seriously interested in understanding the theory of excitations in quantum fluids and solids. ... This is a fine book. I highly recommend it to those who are entering the field, those who want a tutorial on the subjects covered and those who want a guide to the relevant literature.' Robert Hallock, Physics Today, August 1996.