Entanglement of exact excited states of Affleck-Kennedy-Lieb-Tasaki models: Exact results, many-body scars, and violation of the strong eigenstate thermalization …

S Moudgalya, N Regnault, BA Bernevig - Physical Review B, 2018 - APS
We obtain multiple exact results on the entanglement of the exact excited states of
nonintegrable models we introduced in Phys. Rev. B 98, 235155 (2018) 10.1103/PhysRevB …

Exact excited states of nonintegrable models

S Moudgalya, S Rachel, BA Bernevig, N Regnault - Physical Review B, 2018 - APS
We discuss a method of numerically identifying exact energy eigenstates for a finite system,
whose form can then be obtained analytically. We demonstrate our method by identifying …

Symmetry decomposition of negativity of massless free fermions

S Murciano, R Bonsignori, P Calabrese - SciPost Physics, 2021 - scipost.org
We consider the problem of symmetry decomposition of the entanglement negativity in free
fermionic systems. Rather than performing the standard partial transpose, we use the partial …

Finite temperature entanglement negativity in conformal field theory

P Calabrese, J Cardy, E Tonni - Journal of Physics A …, 2014 - iopscience.iop.org
We consider the logarithmic negativity of a finite interval embedded in an infinite one
dimensional system at finite temperature. We focus on conformal invariant systems and we …

Partial time-reversal transformation and entanglement negativity in fermionic systems

H Shapourian, K Shiozaki, S Ryu - Physical Review B, 2017 - APS
The partial transpose of density matrices in many-body quantum systems, in which one
takes the transpose only for a subsystem of the full Hilbert space, has been recognized as a …

Entanglement negativity after a global quantum quench

A Coser, E Tonni, P Calabrese - Journal of Statistical Mechanics …, 2014 - iopscience.iop.org
We study the time evolution of the logarithmic negativity after a global quantum quench. In a
1+ 1-dimensional conformal invariant field theory, we consider the negativity between two …

Entanglement negativity spectrum of random mixed states: A diagrammatic approach

H Shapourian, S Liu, J Kudler-Flam, A Vishwanath - PRX Quantum, 2021 - APS
The entanglement properties of random pure states are relevant to a variety of problems
ranging from chaotic quantum dynamics to black-hole physics. The averaged bipartite …

Imbalance entanglement: Symmetry decomposition of negativity

E Cornfeld, M Goldstein, E Sela - Physical Review A, 2018 - APS
In the presence of symmetry, entanglement measures of quantum many-body states can be
decomposed into contributions from distinct symmetry sectors. Here we investigate the …

On the partial transpose of fermionic Gaussian states

V Eisler, Z Zimborás - New Journal of Physics, 2015 - iopscience.iop.org
We consider Gaussian states of fermionic systems and study the action of the partial
transposition on the density matrix. It is shown that, with a suitable choice of basis, these …

Entanglement negativity in random spin chains

P Ruggiero, V Alba, P Calabrese - Physical Review B, 2016 - APS
We investigate the logarithmic negativity in strongly disordered spin chains in the random-
singlet phase. We focus on the spin-1 2 random Heisenberg chain and the random XX …