Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures (Articolo in rivista)

Type
Label
  • Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/1367-2630/13/3/035013 (literal)
Alternative label
  • Titvinidze, I.; Privitera, A.; Chang, S-Y; Diehl, S.; Baranov, M. A.; Daley, A.; Hofstetter, W. (2011)
    Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures
    in New journal of physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Titvinidze, I.; Privitera, A.; Chang, S-Y; Diehl, S.; Baranov, M. A.; Daley, A.; Hofstetter, W. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 13 (literal)
Rivista
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  • 34 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Goethe University Frankfurt; Consiglio Nazionale delle Ricerche (CNR); International School for Advanced Studies; Austrian Academy of Sciences; University of Innsbruck; Ohio State University (literal)
Titolo
  • Magnetism and domain formation in SU(3)-symmetric multi-species Fermi mixtures (literal)
Abstract
  • We study the phase diagram of an SU(3)-symmetric mixture of three-component ultracold fermions with attractive interactions in an optical lattice, including the additional effect on the mixture of an effective three-body constraint induced by three-body losses. We address the properties of the system in D >= 2 by using dynamical mean-field theory and variational Monte Carlo techniques. The phase diagram of the model shows a strong interplay between magnetism and superfluidity. In the absence of the three-body constraint (no losses), the system undergoes a phase transition from a color superfluid (c-SF) phase to a trionic phase, which shows additional particle density modulations at half-filling. Away from the particle-hole symmetric point the c-SF phase is always spontaneously magnetized, leading to the formation of different c-SF domains in systems where the total number of particles of each species is conserved. This can be seen as the SU(3) symmetric realization of a more general tendency for phase separation in three-component Fermi mixtures. The three-body constraint strongly disfavors the trionic phase, stabilizing a (fully magnetized) c-SF also at strong coupling. With increasing temperature we observe a transition to a non-magnetized SU(3) Fermi liquid phase. (literal)
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