Excitations in the deformed D1D5 CFT

TL;DR

This paper investigates how the deformation of the D1D5 conformal field theory affects initial excitations, showing that it disperses energy among more quanta, which models the evolution of black hole microstates.

Contribution

It provides explicit calculations of state transformations under deformation for states with initial quanta, extending understanding of CFT dynamics near the orbifold point.

Findings

Deformation transforms initial states into more complex states with dispersed energy.

The process models the energy spreading in black hole microstates.

Results are relevant for understanding black hole information dynamics.

Abstract

We perform some simple computations for the first order deformation of the D1D5 CFT off its orbifold point. It had been shown earlier that under this deformation the vacuum state changes to a squeezed state (with the further action of a supercharge). We now start with states containing one or two initial quanta and write down the corresponding states obtained under the action of deformation operator. The result is relevant to the evolution of an initial excitation in the CFT dual to the near extremal D1D5 black hole: when a left and a right moving excitation collide in the CFT, the deformation operator spreads their energy over a larger number of quanta, thus evolving the state towards the infrared.