English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/44439
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Ultracold gases of ytterbium: ferromagnetism and Mott states in an SU(6) Fermi system

AutorCazalilla, M. A.
Fecha de publicaciónoct-2009
EditorInstitute of Physics Publishing
CitaciónNew Journal of Physics 11: 103033 (2009)
ResumenIt is argued that an ultracold quantum degenerate gas of ytterbium 173Yb atoms having nuclear spin I=5/2 exhibits an enlarged SU(6) symmetry. Within the Landau Fermi liquid theory, stability criteria against Fermi liquid (Pomeranchuk) instabilities in the spin channel are considered. Focusing on the SU(n>2) generalizations of ferromagnetism, it is shown within mean-field theory that the transition from the paramagnet to the itinerant ferromagnet is generically first order. On symmetry grounds, general SU(n) itinerant ferromagnetic ground states and their topological excitations are also discussed. These SU(n>2) ferromagnets can become stable by increasing the scattering length using optical methods or in an optical lattice. However, in an optical lattice at current experimental temperatures, Mott states with different filling are expected to coexist in the same trap, as obtained from a calculation based on the SU(6) Hubbard model.
Descripción15 páginas, 3 figuras.-- et al.-- El pdf es la versión pre-print: arXiv:0905.4948v3.-- Trabajo presentado a "APCTP-KIAS Joint Workshop on Quantum Entanglement and Dynamics in Correlated Many-Body Systems" celebrado en Korea del 17 al 21 de mayo de 2010 y al "Quantum coherence and correlations in condensed-matter and cold-atom systems" celebrado en Evora (Portugal) del 11 al 15 de octubre de 2010.
Versión del editorhttp://dx.doi.org/10.1088/1367-2630/11/10/103033
URIhttp://hdl.handle.net/10261/44439
DOI10.1088/1367-2630/11/10/103033
ISSN1367-2630
Aparece en las colecciones: (CFM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
0905.4948v3.pdf305,88 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


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