Spontaneous Symmetry Breaking with Abnormal Number of Nambu-Goldstone Bosons and Kaon Condensate

V. A. Miransky and I. A. Shovkovy
Phys. Rev. Lett. 88, 111601 – Published 28 February 2002
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Abstract

We describe a class of relativistic models incorporating a finite density of matter in which spontaneous breakdown of continuous symmetries leads to a lesser number of Nambu-Goldstone bosons than that required by the Goldstone theorem. This class, in particular, describes the dynamics of the kaon condensate in the color-flavor locked phase of high density QCD. We describe the spectrum of low energy excitations in this dynamics and show that, despite the presence of a condensate and gapless excitations, this system is not a superfluid.

  • Received 23 August 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.111601

©2002 American Physical Society

Authors & Affiliations

V. A. Miransky*

  • Department of Applied Mathematics, University of Western Ontario, London, Ontario, Canada N6A 5B7

I. A. Shovkovy

  • School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455

  • *On leave of absence from Bogolyubov Institute for Theoretical Physics, 252143, Kiev, Ukraine.

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Vol. 88, Iss. 11 — 18 March 2002

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