INVESTIGADORES
NAON Carlos Maria
artículos
Título:
RG study of a non-local sine-Gordon model
Autor/es:
CARLOS M. NAÓN; MARIANO J. SALVAY
Revista:
NUCLEAR PHYSICS B
Editorial:
Elsevier
Referencias:
Año: 2003 vol. 663 p. 591 - 604
ISSN:
0550-3213
Resumen:
We study a non-local version of the sine-Gordon model connected to a many-body system with backward and umklapp scattering processes. Using renormalization group methods we derive the flow equations for the couplings and show how non-locality affects the gap in the spectrum of charge-density excitations. We compare our results with previous predictions obtained through the self-consistent harmonic approximation.
