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Measuring entanglement using quantum quenches
John Cardy
We show that block entanglement entropies in one-dimensional systems close to a quantum critical point can in principle be measured in terms of the population of low-lying energy l…
Entanglement entropy of two disjoint intervals in conformal field theory II
Pasquale Calabrese, John Cardy, Erik Tonni
We continue the study of the entanglement entropy of two disjoint intervals in conformal field theories that we started in J. Stat. Mech. (2009) P11001. We compute Trρ_A^n for any…
The Ubiquitous 'c': from the Stefan-Boltzmann Law to Quantum Information
John Cardy
I discuss various aspects of the role of the conformal anomaly number c in 2- and 1+1-dimensional critical behaviour: its appearance as the analogue of Stefan's constant, its funda…
Corrections to scaling for block entanglement in massive spin-chains
Pasquale Calabrese, John Cardy, Ingo Peschel
We consider the Renyi entropies S_n in one-dimensional massive integrable models diagonalizable by means of corner transfer matrices (as Heisenberg and Ising spin chains). By means…
Quantum Network Models and Classical Localization Problems
John Cardy
A review is given of quantum network models in class C which, on a suitable 2d lattice, describe the spin quantum Hall plateau transition. On a general class of graphs, however, ma…
Unusual Corrections to Scaling in Entanglement Entropy
John Cardy, Pasquale Calabrese
We present a general theory of the corrections to the asymptotic behaviour of the Renyi entropies which measure the entanglement of an interval A of length L with the rest of an in…