Author:
Nicolis Alberto,Penco Riccardo,Piazza Federico,Rosen Rachel A.
Abstract
Abstract
It was recently argued that certain relativistic theories at finite density can exhibit an unconventional spectrum of Goldstone excitations, with gapped Goldstones whose gap is exactly calculable in terms of the symmetry algebra. We confirm this result as well as previous ones concerning gapless Goldstones for non-relativistic systems via a coset construction of the low-energy effective field theory. Moreover, our analysis unveils additional gapped Goldstones, naturally as light as the others, but this time with a model-dependent gap. Their exact number cannot be inferred solely from the symmetry breaking pattern either, but rather depends on the details of the symmetry breaking mechanism — a statement that we explicitly verify with a number of examples. Along the way we provide what we believe to be a particularly transparent interpretation of the so-called inverse-Higgs constraints for spontaneously broken spacetime symmetries.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
Reference23 articles.
1. A. Nicolis and F. Piazza, A relativistic non-relativistic Goldstone theorem: gapped goldstones at finite charge density, Phys. Rev. Lett.
110 (2013) 011602 [arXiv:1204.1570] [INSPIRE].
2. C.G. Callan Jr., S.R. Coleman, J. Wess and B. Zumino, Structure of phenomenological lagrangians. 2, Phys. Rev.
177 (1969) 2247 [INSPIRE].
3. S.R. Coleman, J. Wess and B. Zumino, Structure of phenomenological lagrangians. 1, Phys. Rev.
177 (1969) 2239 [INSPIRE].
4. D.V. Volkov, Phenomenological Lagrangians, Fiz. Elem. Chast. Atom. Yadra
4 (1973) 3.
5. V.I. Ogievetsky, Nonlinear realizations of internal and space-time symmetries, in the proceedings of the X winter school of theoretical physics in Karpacz, Universitas Wratislaviensis, Wroclaw, Poland (1974).
Cited by
73 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献