On The Field Theory Limit Of D-Instantons

TL;DR

This paper investigates the behavior of D-instantons in type IIB superstring theory, analyzing their field configurations, supersymmetry, and implications for the IIB Matrix Model in the field theory limit.

Contribution

It provides a detailed analysis of D-instanton configurations in the field theory limit, including metric behavior, string coupling, and supersymmetry, with implications for the IIB Matrix Model.

Findings

Metric becomes flat near instantons in the field theory limit

String coupling approaches zero away from the origin at large N

Supersymmetry of the configuration is analyzed and discussed

Abstract

We study the dilaton/axion configuration near D-instantons in type IIB superstring theory. In the field theory limit, the metric near the instantons becomes flat in the string frame as well as in the Einstein frame. In the large N limit, the string coupling constant becomes zero except near the origin. The supersymmetry of this configuration is analyzed. An implication of this result to the IIB Matrix Model is discussed.