D-Instantons and asymptotic geometries

TL;DR

This paper explores the relationship between D-instantons, D3-branes, and asymptotic geometries, revealing that the large N limit of D3-branes is equivalent to a type IIB S-duality through D-instanton duality, offering an alternative derivation of the near-horizon geometry.

Contribution

It demonstrates that the large N limit of D3-branes can be understood via D-instanton and S-duality, providing a new perspective on the near-horizon geometry derivation.

Findings

Large N D3-brane limit corresponds to superconformal field theory on AdS boundary.

D-instanton duality reproduces the near-horizon geometry via S-duality.

Alternative derivation using D-instantons instead of gravitational waves.

Abstract

The large N limit of D3-branes is expected to correspond to a superconformal field theory living on the boundary of the anti-de Sitter space appearing in the near-horizon geometry. Dualizing the D3-brane to a D-instanton, we show that this limit is equivalent to a type IIB S-duality. In both cases one effectively reaches the near-horizon geometry. This provides an alternative approach to an earlier derivation of the same result that makes use of the properties of a gravitational wave instead of the D-instanton.