Holographic Entanglement Entropy for Excited States in Two Dimensional CFT

Understand

We use holographic methods to study the entanglement entropy for excited states in a two dimensional conformal field theory.

• The entangling area is a single interval and the excitations are produced by in and out vertex operators with given scaling dimensions.
• On the gravity side we provide the excitations by turning on a scalar field with an appropriate mass.
• The calculation amounts to using the gravitational background, with a singular boundary, to find the one point function of the vertex operators.