Increasing entanglement through engineered disorder in the random Ising chain

Abstract

The ground state entanglement entropy between block of sites in the random Ising chain is studied by means of the Von Neumann entropy. We show that in presence of strong correlations between the disordered couplings and local magnetic fields the entanglement increases and becomes larger than in the ordered case. The different behavior with respect to the uncorrelated disordered model is due to the drastic change of the ground state properties. The same result holds also for the random 3-state quantum Potts model.

4 pages, published version, a few typos corrected

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• Entanglement entropy and conformal field theory
• Quantum entanglement in condensed matter systems
• Violation of area-law scaling for the entanglement entropy in spin 1/2 chains
• The entanglement negativity in random spin chains
• Entanglement equipartition in critical random spin chains
• Entanglement spectrum of random-singlet quantum critical points
• Statistical translation invariance protects a topological insulator from interactions
• Dynamic-Disorder-Induced Enhancement of Entanglement in Photonic Quantum Walks
• Protecting clean critical points by local disorder correlations
• Nonadditive entropy for random quantum spin-S chains
• Entanglement properties of correlated random spin chains and similarities with conformal invariant systems
• Negativity Spectrum in the Random Singlet Phase
• Surface and bulk entanglement in free-fermion chains
• Sharp entanglement thresholds in the logarithmic negativity of disjoint blocks in the transverse-field Ising chain
• Enhancing the Detection of Natural Thermal Entanglement with Disorder
• Entanglement in correlated random spin chains, RNA folding and kinetic roughening
• Entanglement generation between distant parties via disordered spin chains
• Violation of the Bell inequality in quantum critical random spin-$1/2$ chains
• Magnetic phases of spin-1 lattice gases with random interactions
• Concurrence in Disordered Systems
• Schmidt gap in random spin chains
• Entanglement entropy and localization in disordered quantum chains
• Reducing defect production in random transverse-field Ising chains by inhomogeneous driving fields
• Response of entanglement to annealed vis-à-vis quenched disorder in quantum spin models
• Exact bounds on the energy gap of transverse-field Ising chains by mapping to random walks