Phonons as Goldstone Bosons
Abstract
The implications of the hidden, spontaneously broken symmetry for the properties of the sound waves of a solid are analyzed. Although the discussion does not go beyond standard wisdom, it presents some of the known results from a different perspective. In particular, I argue that, as a consequence of the hidden symmetry, the equations of motion for a sound wave necessarily contain nonlinear terms, describing phononphonon scattering and emphasize the analogy with the low energy theorems for pionpion scattering.
 Publication:

arXiv eprints
 Pub Date:
 September 1996
 arXiv:
 arXiv:hepph/9609466
 Bibcode:
 1996hep.ph....9466L
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 12 pages, Latex file