Two-fluid coexistence in a spinless fermions chain with pair hopping – Archive ouverte HAL

Lorenzo Gotta 1 Leonardo Mazza 1 Pascal Simon 2 Guillaume Roux 1

Lorenzo Gotta, Leonardo Mazza, Pascal Simon, Guillaume Roux. Two-fluid coexistence in a spinless fermions chain with pair hopping. Phys.Rev.Lett., 2021, 126 (20), pp.206805. ⟨10.1103/PhysRevLett.126.206805⟩. ⟨hal-03115808⟩

We show that a simple one-dimensional model of spinless fermions with pair hopping displays a phase in which a Luttinger liquid of paired fermions coexists with a Luttinger liquid of unpaired fermions. Our results are based on extensive numerical density-matrix renormalization-group calculations and are supported by a two-fluid model that captures the essence of the coexistence region.

  • 1. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
  • 2. LPS - Laboratoire de Physique des Solides