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Phys. Rev. Lett. 88, 111601 (2002) [4 pages]

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

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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

Received 23 August 2001; published 28 February 2002

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.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.111601
DOI:
10.1103/PhysRevLett.88.111601
PACS:
11.30.Qc, 12.38.Aw, 21.65.+f

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

†

 
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