We analyze correlations between subsystems for an extended Hubbard model exactly
solvable in one dimension, which exhibits a rich structure of quantum phase transitions …

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 …

Entanglement and Quantum Phase Transition in the Extended Hubbard Model Page 1
Entanglement and Quantum Phase Transition in the Extended Hubbard Model Shi-Jian Gu,1,2 …

We study the pairwise entanglement close to separable ground states of a class of one-
dimensional quantum spin models. At T= 0 we find that such ground states separate regions …

We provide insight into the quantum correlations structure present in strongly correlated
systems beyond the standard framework of bipartite entanglement. To this aim we first …

Frustration and quantum entanglement are two exotic quantum properties in quantum many-
body systems. However, despite several efforts, an exact relationship between them remains …

We show that the single-site entanglement of a generic spin-1/2 fermionic lattice system can
be used as a reliable marker of a finite-order quantum phase transition, given certain …

We analyze the quantum phase transition in the Bose-Hubbard model borrowing two tools
from quantum-information theory, ie, the ground-state fidelity and entanglement measures …

Characterizing and quantifying quantum correlations in states of many-particle systems is at
the core of a full understanding of phase transitions in matter. In this work, we continue our …

We derive a general relation between the nonanalyticities of the ground state energy and
those of a subclass of the multipartite generalized global entanglement (GGE) measure …