2014

Holographic Entanglement Entropy from 2d CFT: Heavy States and Local Quenches

Asplund, Curtis T., Bernamonti, Alice, Galli, Federico et al.

Understand

We consider the entanglement entropy in 2d conformal field theory in a class of excited states produced by the insertion of a heavy local operator.

These include both high-energy eigenstates of the Hamiltonian and time-dependent local quenches.
We compute the universal contribution from the stress tensor to the single interval Renyi entropies and entanglement entropy, and conjecture that this dominates the answer in theories with a large central charge and a sparse spectrum of low-dimension operators.
The resulting entanglement entropies agree precisely with holographic calculations in three-dimensional gravity.

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