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Goldstone bosons in presence of charge density
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SYSNO ASEP 0094032 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Goldstone bosons in presence of charge density Title Goldstoneovy bosony za pritomnosti nabojove hustoty Author(s) Brauner, Tomáš (UJF-V) RID Source Title Physical Review. D - ISSN 0556-2821
Roč. 75, č. 10 (2007), s. 105014-105014Number of pages 1 s. Language eng - English Country US - United States Keywords spontaneous symmetry breaking ; goldstone boson counting ; two-color QCD Subject RIV BE - Theoretical Physics R&D Projects GA202/06/0734 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10480505 - UJF-V (2005-2011) Annotation We investigated general features of spontaneous symmetry breaking in systems with nonzero density of a conserved charge. Based on a Ward identity for the Noether currents, we proved in a model-independent way that nonzero density of a commutator of two conserved charges implies the existence of a Goldstone boson with quadratic dispersion relation. The general result is illustrated on a number of examples. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2008
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