$R^2$ corrected AdS$_2$ holography

TL;DR

This paper constructs an explicit holographic dictionary for AdS$_2$/CFT$_1$ in higher derivative gravity, linking black hole entropy to boundary operators and embedding the dual CFT in a higher-dimensional context.

Contribution

It provides a detailed holographic dictionary for AdS$_2$/CFT$_1$ with higher derivative corrections, including black hole entropy encoding and embedding in AdS$_3$/CFT$_2$.

Findings

Wald entropy is encoded in boundary operator anomalies.

The dual CFT$_1$ is embedded in the chiral sector of CFT$_2$.

Explicit identification of boundary operators for higher derivative actions.

Abstract

We approach the problem of constructing an explicit holographic dictionary for the AdS$_2$/CFT$_1$ correspondence in the context of higher derivative gravitational actions in AdS$_2$ space-times. These actions are obtained by an $S^2$ reduction of four-dimensional ${\cal N}=2$ Wilsonian effective actions with Weyl squared interactions restricted to constant scalar backgrounds. BPS black hole near-horizon space-times fall into this class of backgrounds, and by identifying the boundary operators dual to the bulk fields, we explicitly show how the Wald entropy of the BPS black hole is holographically encoded in the anomalous transformation of the operator dual to a composite bulk field. Additionally, using a 2d/3d lift, we show that the CFT holographically dual to AdS$_2$ is naturally embedded in the chiral half of the CFT$_2$ dual to the AdS$_3$ space-time, and we identify the specific operator in CFT$_1$ that encodes the chiral central charge of the CFT$_2$.