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Lieb-Liniger model with exponentially decaying interactions Artículos académico

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Resumen

  • The Lieb-Liniger model describes one-dimensional bosons interacting through a repulsive contact potential. In this work, we introduce an extended version of this model by replacing the contact potential with a decaying exponential. Using the recently developed continuous matrix product states techniques, we explore the ground-state phase diagram of this model by examining the superfluid and density correlation functions. At weak coupling superfluidity governs the ground state, in a similar way as in the Lieb-Liniger model. However, at strong coupling quasicrystal and super-Tonks-Girardeau regimes are also found, which are not present in the original Lieb-Liniger case. Therefore the presence of the exponentially decaying potential leads to a superfluid/super-Tonks-Girardeau/quasicrystal crossover, when tuning the coupling strength from weak to strong interactions. This corresponds to a Luttinger liquid parameter in the range K(0,∞), in contrast with the Lieb-Liniger model, where K[1,), and the screened long-range potential, where K(0,1].

Área temática

  • Fin de la pobreza

autores

  • http://research-hub.urosario.edu.co/ontology/vlocal#ExcludedPerson
    Guifre Vidal
  • http://research-hub.urosario.edu.co/ontology/vlocal#ExcludedPerson
    Julian Rincon
  • http://research-hub.urosario.edu.co/ontology/vlocal#ExcludedPerson
    Martin Ganahl

Publicado en

  • Physical Review B - Condensed Matter and Materials Physics Revistas

fecha de publicación

  • septiembre 2, 2015

Identidad

Identificador de objeto digital (DOI)

  • https://doi.org/10.1103/physrevb.92.115107

Información adicional de documento

Volumen

  • 92

Cuestión

  • 11