Entanglement in many-body systems
Recent interest in aspects common to quantum information and condensed matter has
prompted a flurry of activity at the border of these disciplines that were far distant until a few …
prompted a flurry of activity at the border of these disciplines that were far distant until a few …
Genuine quantum correlations in quantum many-body systems: a review of recent progress
G De Chiara, A Sanpera - Reports on Progress in Physics, 2018 - iopscience.iop.org
Quantum information theory has considerably helped in the understanding of quantum many-
body systems. The role of quantum correlations and in particular, bipartite entanglement …
body systems. The role of quantum correlations and in particular, bipartite entanglement …
Quantum correlations in spin chains at finite temperatures and quantum phase transitions
T Werlang, C Trippe, GAP Ribeiro, G Rigolin - Physical review letters, 2010 - APS
We compute the quantum correlation [quantum discord (QD)] and the entanglement (EOF)
between nearest-neighbor qubits (spin-1/2) in an infinite chain described by the Heisenberg …
between nearest-neighbor qubits (spin-1/2) in an infinite chain described by the Heisenberg …
String-net formulation of Hamiltonian lattice Yang-Mills theories and quantum many-body scars in a nonabelian gauge theory
A bstract We study the Hamiltonian lattice Yang-Mills theory based on spin networks that
provide a useful basis to represent the physical states satisfying the Gauss law constraints …
provide a useful basis to represent the physical states satisfying the Gauss law constraints …
Quantum correlations, entanglement spectrum, and coherence of the two-particle reduced density matrix in the extended Hubbard model
We study the ground state properties of the one-dimensional extended Hubbard model at
half filling from the perspective of its particle reduced density matrix. We focus on the …
half filling from the perspective of its particle reduced density matrix. We focus on the …
Quantum simulation of a system with competing two-and three-body interactions
Quantum phase transitions occur at zero temperature, when the ground state of a
Hamiltonian undergoes a qualitative change as a function of a control parameter. We …
Hamiltonian undergoes a qualitative change as a function of a control parameter. We …
Ground-state fidelity in one-dimensional gapless models
MF Yang - Physical Review B—Condensed Matter and Materials …, 2007 - APS
A general relation between quantum phase transitions and the second derivative of the
fidelity (or the “fidelity susceptibility”) is proposed. The validity and the limitation of the fidelity …
fidelity (or the “fidelity susceptibility”) is proposed. The validity and the limitation of the fidelity …
Detecting quantum critical points at finite temperature via quantum teleportation: Further models
GAP Ribeiro, G Rigolin - Physical Review A, 2024 - APS
In previous work [Phys. Rev. A 107, 052420 (2023) 2469-9926 10.1103/PhysRevA.
107.052420] we showed that the quantum teleportation protocol can be used to detect …
107.052420] we showed that the quantum teleportation protocol can be used to detect …
Quantum coherence of planar spin models with Dzyaloshinsky-Moriya interaction
The quantum coherence of one-dimensional planar spin models with Dzyaloshinsky-Moriya
interaction is investigated. The anisotropic XY model, the isotropic XX model, and the …
interaction is investigated. The anisotropic XY model, the isotropic XX model, and the …
Direct observation of quantum criticality in Ising spin chains
We use NMR quantum simulators to study antiferromagnetic Ising spin chains undergoing
quantum phase transitions. Taking advantage of the sensitivity of the systems near criticality …
quantum phase transitions. Taking advantage of the sensitivity of the systems near criticality …