Three-dimensional dynamics of a fermionic Mott wedding-cake in clean and disordered optical lattices (Articolo in rivista)

Type
Label
  • Three-dimensional dynamics of a fermionic Mott wedding-cake in clean and disordered optical lattices (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1038/srep02570 (literal)
Alternative label
  • Kartsev, A.; Karlsson, D.; Privitera, A.; Verdozzi, C. (2013)
    Three-dimensional dynamics of a fermionic Mott wedding-cake in clean and disordered optical lattices
    in Scientific reports (Nature Publishing Group)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Kartsev, A.; Karlsson, D.; Privitera, A.; Verdozzi, C. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 3 (literal)
Rivista
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  • 7 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Lund University; Consiglio Nazionale delle Ricerche (CNR); International School for Advanced Studies (literal)
Titolo
  • Three-dimensional dynamics of a fermionic Mott wedding-cake in clean and disordered optical lattices (literal)
Abstract
  • Non-equilibrium quantum phenomena are ubiquitous in nature. Yet, theoretical predictions on the real-time dynamics of many-body quantum systems remain formidably challenging, especially for high dimensions, strong interactions or disordered samples. Here we consider a notable paradigm of strongly correlated Fermi systems, the Mott phase of the Hubbard model, in a setup resembling ultracold-gases experiments. We study the three-dimensional expansion of a cloud into an optical lattice after removing the confining potential. We use time-dependent density-functional theory combined with dynamical mean-field theory, considering interactions below and above the Mott threshold, as well as disorder effects. At strong coupling, we observe multiple timescales in the melting of the Mott wedding-cake structure, as the Mott plateau persist orders of magnitude longer than the band insulating core. We also show that disorder destabilises the Mott plateau and that, compared to a clean setup, localisation can decrease, creating an interesting dynamic crossover during the expansion. (literal)
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