41 citations · 108 across the 7 of their papers we have counts for
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Hidden XY structure of the bond-charge Hubbard model
Marco Roncaglia, Cristian Degli Esposti Boschi, Arianna Montorsi
The repulsive one-dimensional Hubbard model with bond-charge interaction (HBC) in the superconducting regime is mapped onto the spin-1/2 XY model with transverse field. We calculat…
Nanoscale phase separation and superconductivity in the one-dimensional Hirsch model
Alberto Anfossi, Cristian Degli Esposti Boschi, Arianna Montorsi
We investigate numerically at various fillings the ground state of the one-dimensional Hubbard model with correlated hopping x (Hirsch model). It is found that, for a wide range of…
Phase separation in fermionic systems with particle-hole asymmetry
Arianna Montorsi
We determine the ground-state phase-diagram of a Hubbard Hamiltonian with correlated hopping, which is asymmetric under particle-hole transform. By lowering the repulsive Coulomb i…
Incommmensurability and unconventional superconductor to insulator transition in the Hubbard model with bond-charge interaction
A. A. Aligia, A. Anfossi, L. Arrachea +6
We determine the quantum phase diagram of the one-dimensional Hubbard model with bond-charge interaction X in addition to the usual Coulomb repulsion U at half-filling. For large e…
Entanglement in extended Hubbard models and quantum phase transitions
Alberto Anfossi, Paolo Giorda, Arianna Montorsi
The role of two-point and multipartite entanglement at quantum phase transitions (QPTs) in correlated electron systems is investigated. We consider a bond-charge extended Hubbard m…
Single-site entanglement at superconductor-insulator transition in the Hirsch model
Alberto Anfossi, Cristian Degli Esposti Boschi, Arianna Montorsi +1
We investigate the transition to the insulating state in the one-dimensional Hubbard model with bond-charge interaction x (Hirsch model), at half-filling and T=0. By means of the d…