Effective Field Theory for Goldstone Bosons in Nonrelativistic Superfluids

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We consider nonrelativistic superfluids where the global U(1)-symmetry is spontaneously broken. At sufficiently long wavelengths, the relevant degree of freedom is the massless Goldstone mode and we construct an effective low energy theory for the Goldstone boson. The damping rate of collective excitations at low energy is calculated. In the case of a weakly interacting Bose gas, we recover the results by Beliaev, and by Hohenberg and Martin.
4 pages, 1 figure, revtex

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Condensed Matter, High Energy Physics - Phenomenology

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http://salesiana.dossiersoluciones.com/handle/123456789/19930

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0209243
 http://arxiv.org/abs/cond-mat/0209243

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arXiv