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cond-mat.str-el2005
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…
cond-mat.str-el2005
Two-Point Versus Multipartite Entanglement in Quantum Phase Transitions
Alberto Anfossi, Paolo Giorda, Arianna Montorsi +1
We analyze correlations between subsystems for an extended Hubbard model exactly solvable in one dimension, which exhibits a rich structure of quantum phase transitions (QPTs). The…