Entanglement in many-body systems

L Amico, R Fazio, A Osterloh, V Vedral - Reviews of modern physics, 2008 - APS
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 …

Quantum discord and its allies: a review of recent progress

A Bera, T Das, D Sadhukhan, SS Roy… - Reports on Progress …, 2017 - iopscience.iop.org
We review concepts and methods associated with quantum discord and related topics. We
also describe their possible connections with other aspects of quantum information and …

Proximate spin liquid and fractionalization in the triangular antiferromagnet KYbSe2

AO Scheie, EA Ghioldi, J Xing, JAM Paddison… - Nature Physics, 2024 - nature.com
The Heisenberg triangular-lattice quantum spin liquid and its phase transitions to nearby
magnetic orders have received much theoretical attention, but clear experimental …

General monogamy inequality for bipartite qubit entanglement

TJ Osborne, F Verstraete - Physical review letters, 2006 - APS
We consider multipartite states of qubits and prove that their bipartite quantum
entanglement, as quantified by the concurrence, satisfies a monogamy inequality …

Witnessing entanglement in quantum magnets using neutron scattering

A Scheie, P Laurell, AM Samarakoon, B Lake… - Physical Review B, 2021 - APS
We demonstrate how quantum entanglement can be directly witnessed in the quasi-1D
Heisenberg antiferromagnet KCuF 3. We apply three entanglement witnesses—one tangle …

Entanglement entropy dynamics of Heisenberg chains

G De Chiara, S Montangero… - Journal of Statistical …, 2006 - iopscience.iop.org
By means of the time dependent density matrix renormalization group algorithm we study
the zero-temperature dynamics of the Von Neumann entropy of a block of spins in a …

Quantifying and Controlling Entanglement in the Quantum Magnet

P Laurell, A Scheie, CJ Mukherjee, MM Koza… - Physical Review Letters, 2021 - APS
The lack of methods to experimentally detect and quantify entanglement in quantum matter
impedes our ability to identify materials hosting highly entangled phases, such as quantum …

Localizable entanglement

M Popp, F Verstraete, MA Martín-Delgado… - Physical Review A—Atomic …, 2005 - APS
We consider systems of interacting spins and study the entanglement that can be localized,
on average, between two separated spins by performing local measurements on the …

Machine-learning-assisted many-body entanglement measurement

J Gray, L Banchi, A Bayat, S Bose - Physical review letters, 2018 - APS
Entanglement not only plays a crucial role in quantum technologies, but is key to our
understanding of quantum correlations in many-body systems. However, in an experiment …

Ground-state fidelity and bipartite entanglement in the Bose-Hubbard model

P Buonsante, A Vezzani - Physical review letters, 2007 - APS
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 …