info:eu-repo/semantics/article
RG study of a non-local sine-Gordon model
Fecha
2003-07Registro en:
Naon, Carlos Maria; Salvay, Mariano Juan; RG study of a non-local sine-Gordon model; Elsevier Science; Nuclear Physics B; 663; 3; 7-2003; 591-604
0550-3213
CONICET Digital
CONICET
Autor
Naon, Carlos Maria
Salvay, Mariano Juan
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. © 2003 Elsevier B.V. All rights reserved.