From conformal to volume-law for the entanglement entropy in exponentially deformed critical spin 1/2 chains

Abstract

An exponential deformation of 1D critical Hamiltonians gives rise to ground states whose entanglement entropy satisfies a volume-law. This effect is exemplified in the XX and Heisenberg models. In the XX case we characterize the crossover between the critical and the maximally entangled ground state in terms of the entanglement entropy and the entanglement spectrum.

Accepted for the Special Issue: Quantum Entanglement in Condensed Matter Physics. 11 pages, 9 figures (with enhanced size to focus on the details) and new references

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• Entanglement renormalization for disordered systems
• Exact Thermal Eigenstates of Nonintegrable Spin Chains at Infinite Temperature
• Link representation of the entanglement entropies for all bipartitions
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• Hidden Bethe states in a partially integrable model
• Entanglement links and the quasiparticle picture
• Wilsonian Effective Action and Entanglement Entropy
• Tower of two-dimensional scar states in a localized system
• Efficient computation of matrix elements of generic Slater determinants
• Excited-Eigenstate Entanglement Properties of XX Spin Chains with Random Long-Range Interactions
• Dissipative stabilization of entangled qubit pairs in quantum arrays with a single localized dissipative channel
• Measurement-Induced Spectral Transition
• Entanglement in non-critical inhomogeneous quantum chains
• Entanglement entropy and localization in disordered quantum chains
• Depletion in fermionic chains with inhomogeneous hoppings
• Variational quantum eigensolver with embedded entanglement using a tensor-network ansatz
• Inhomogeneous Quantum Quenches of Conformal Field Theory with Boundaries
• Bicolor loop models and their long range entanglement
• Exotic correlation spread in free-fermionic states with initial patterns
• $Q$-Deformed Rainbows: a Universal Simulator of Free Entanglement Spectra
• Generating Symmetry-Protected Long-Range Entanglement in Many-Body Systems
• Rainbow chains and numerical renormalisation group for accurate chiral conformal spectra
• Quantum lozenge tiling and entanglement phase transition
• Universal entanglement signatures of quantum liquids as a guide to fermionic criticality
• Symmetric tensor scars with tunable entanglement from volume to area law
• TTNOpt: Tree tensor network package for high-rank tensor compression
• Creating long-range entangled Majorana pairs: from spin-1/2 twisted Kitaev to generalized XY chains
• Local fermion density in inhomogeneous free-fermion chains: a discrete WKB approach
• Optimal bound on long-range distillable entanglement
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