Аннотация: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
