Holographic interpolations of codimension-2 defect CFTs

TL;DR

This paper reviews the holographic description and properties of codimension-2 defect conformal field theories, highlighting recent developments in non-supersymmetric configurations and physical observable calculations.

Contribution

It provides a comprehensive overview of holographic interpolations of codimension-2 defects, including non-supersymmetric cases and observable computations at different coupling regimes.

Findings

Agreement between weak and strong coupling results confirms holographic duality.

Analysis of non-supersymmetric D3/D5 configurations expands understanding of defect CFTs.

Calculation of stress-energy tensor and operator one-point functions demonstrates holographic correspondence.

Abstract

We provide a comprehensive overview of the current status of higher-codimension defect systems. We review the holographic description and field theoretic properties of codimension-2 defects within the framework of defect Conformal Field Theories (dCFTs). Starting from the well-established classification of $1/2$-BPS supersymmetric defects, we examine their realisation through probe branes and bubbling supergravity geometries. Special emphasis is placed on recent developments involving non-supersymmetric D3/D5 configurations and their holographic interpolations. We discuss the calculation of important physical observables, such as one-point functions of the stress-energy tensor and chiral primary operators, across both weak and strong coupling regimes. The agreement of the results in the two regimes exhibits the full power of the holographic principle. This is a proceedings contribution to the Athens Workshop in Theoretical Physics: 10th Anniversary, held at the National and Kapodistrian University of Athens on December 17-19 2025.