English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/102866
Compartir / Impacto:
Add this article to your Mendeley library MendeleyBASE
Citado 14 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)


Autor Huerga, Daniel ; Dukelsky, Jorge ; Scuseria, Gustavo E.
Fecha de publicación 2013
EditorAmerican Physical Society
Citación Physical Review Letters 111: 045701 (2013)
ResumenWe present a canonical mapping transforming physical boson operators into quadratic products of cluster composite bosons that preserves matrix elements of operators when a physical constraint is enforced. We map the 2D lattice Bose-Hubbard Hamiltonian into 2×2 composite bosons and solve it within a generalized Hartree-Bogoliubov approximation. The resulting Mott insulator-superfluid phase diagram reproduces well quantum Monte Carlo results. The Higgs boson behavior in the superfluid phase along the unit density line is unraveled and in remarkable agreement with experiments. Results for the properties of the ground and excited states are competitive with other state-of-the-art approaches, but at a fraction of their computational cost. The composite boson mapping here introduced can be readily applied to frustrated many-body systems where most methodologies face significant hurdles. © 2013 American Physical Society.
URI http://hdl.handle.net/10261/102866
Identificadoresdoi: 10.1103/PhysRevLett.111.045701
issn: 0031-9007
Aparece en las colecciones: (CFMAC-IEM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
DHuerga.pdf293,71 kBAdobe PDFVista previa
Mostrar el registro completo

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.