Phonons as Goldstone Bosons

Details Phonons as Goldstone Bosons Phonons as Goldstone Bosons

1996-09-25

arxiv.org/abs/hep-ph/9609466v1

Helv.Phys.Acta 70 (1997) 275-286

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, Latex file

Scientific paper

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 phonon-phonon scattering and emphasize the analogy with the low energy theorems for pion-pion scattering.

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