Correlation Functions and Quasiparticle Interactions in Condensed Matter

✍ Scribed by R. B. Stinchcombe (auth.), J. Woods Halley (eds.)

• Publisher: Springer US
• Year: 1978
• Tongue: English
• Leaves: 657
• Series: NATO Advanced Study Institutes Series 35
• Edition: 1
• Category: Library

✦ Synopsis

This volume contains the proceedings of a NATO Advanced Study Institute devoted to the study of dynamical correlation functions of the form (I) J~e-lwt 6ft T- is an equilibrium average. In equation (1) it is useful to regard the product AB as the product of two operators in cases in which A and B refer to different spatial points in a condensed matter sys­ tem and/or in which A and B behave dynamically in a quasiharmonic way. In the second case, one has a two quasiparticle correlation function and CAB;AB(w) gives information about quasiparticle inter­ actions. Condensed matter physics has increasingly turned its attention to correlation functions of this type during the last 15 years, partly because the two point and/or one-particle correlation functions have by now been very thoroughly studied in many cases. The study of four point and/or two quasiparticle correlations has proceeded somewhat independently in several diverse fields of condensed matter physics and it was one purpose of the institute to bring experts from these different fields together to describe the current state of their art to each other and to advanced students.

✦ Table of Contents

Front Matter....Pages i-xi
Front Matter....Pages 1-1
Kubo and Zubarev Formulations of Response Theory....Pages 3-44
Perturbation Theory of Response Functions....Pages 45-98
Renormalization Group Approach to Dynamic Critical Phenomena....Pages 99-234
Nonlinear Response Theory....Pages 235-258
Front Matter....Pages 259-259
Magnetic Excitations....Pages 261-305
A Green Function Approach to Two-Magnon Light Scattering in Antiferromagnets at T < T N ....Pages 307-311
Two-Spin Light Scattering in Heisenberg Antiferromagnets....Pages 313-317
Two-Magnon Spectra of Ferromagnets....Pages 319-323
Light Scattering Determinations of Dynamic Four Point Correlation Functions....Pages 325-361
Front Matter....Pages 363-363
Second-Order Light Scattering by Classical Fluids I: Collision Induced Scattering....Pages 365-388
Second-Order Light Scattering by Classical Fluids II: Double Light Scattering by Critical Fluids....Pages 389-416
Numerical Calculations in Classical Liquids....Pages 417-433
Optical Polarization in Molecular Dielectric Fluids....Pages 435-439
Rotational Relaxation of Solute Molecules in Dense Noble Gases....Pages 441-445
Spinodal Decomposition: An Outline....Pages 447-451
Mode Coupling Calculations of Critical Phenomena and Polymer Dynamics....Pages 453-458
Two Roton Raman Scattering in Superfluid He 4 ....Pages 459-463
Roton Bound States in Liquid 4 He....Pages 465-468
Integrated Raman Intensity in 4 He....Pages 469-473
Response Function of the Superconducting Order Parameter....Pages 475-479
Front Matter....Pages 481-481
Second Order Phonon Spectra....Pages 483-572
Neutron Scattering and Interactions between Excitations....Pages 573-602
Optical Response of Quantum Crystals....Pages 603-639
Anharmonic Interference in Scattering Experiments....Pages 641-645
Back Matter....Pages 647-665

✦ Subjects

Physics, general