Theta-vacuum and large N limit in CPN-1   models
Resumen: The ¿ dependence of the vacuum energy density in models is re-analysed in the semiclassical approach, the expansion and arguments based on the nodal structure of vacuum wavefunctionals. The expansion is shown not to be in contradiction with instanton physics at finite (spacetime) volume V. The interplay of large volume V and large N parameter gives rise to two regimes with different ¿ dependence, one behaving as a dilute instanton gas and the other dominated by the traditional large N picture, where instantons reappear as resonances of the one-loop effective action, even in the absence of regular instantonic solutions. The realms of the two regimes are given in terms of the mass gap m by and , respectively. The small volume regime is relevant for physical effects associated to the physics of the boundary, like the leading rôle of edge states in the quantum Hall effect, which, however, do not play any rôle in the thermodynamic limit at large N. Depending on the order in which the limits and are taken, two different theories are obtained; this is the hallmark of a phase transition at .
Idioma: Inglés
DOI: 10.1016/j.nuclphysb.2010.11.004
Año: 2011
Publicado en: NUCLEAR PHYSICS B 844, 2 (2011), 243-265
ISSN: 0550-3213

Factor impacto JCR: 4.661 (2011)
Categ. JCR: PHYSICS, PARTICLES & FIELDS rank: 5 / 27 = 0.185 (2011) - Q1 - T1
Financiación: info:eu-repo/grantAgreement/ES/DGA/E24-2
Financiación: info:eu-repo/grantAgreement/ES/MICINN/FPA2009-09638
Tipo y forma: Article (Published version)
Área (Departamento): Física Teórica (Departamento de Física Teórica)

Creative Commons You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

Exportado de SIDERAL (2017-09-07-09:54:46)

Visitas y descargas

Este artículo se encuentra en las siguientes colecciones:
Articles > Artículos por área > Física Teórica

 Record created 2017-09-07, last modified 2017-09-07

Versión publicada:
Rate this document:

Rate this document:
(Not yet reviewed)