Vertex operator formulation of scattering around black hole

TL;DR

This paper develops a string theory framework to analyze black hole information paradox, modeling scattering around a D5-brane as a potential, suggesting information loss is due to observational limitations rather than fundamental non-unitarity.

Contribution

It introduces a vertex operator formulation for string scattering around a D5-brane, offering a new approach to reconcile unitarity with black hole information loss.

Findings

The setup models black hole information paradox within string theory.

Information loss appears due to observer limitations, not fundamental non-unitarity.

The framework suggests a potential resolution to the paradox.

Abstract

We propose a full-fledged open string framework that seems suited to study the black hole information paradox. We set up a configuration to compute the scattering amplitude of a IIB open string around a D5-brane. The D5-brane is situated at the origin of a transverse D3-brane. A string perturbation theory is employed where the geometry of the D5-brane is treated as a potential. We reason that the setup is capable of reconciling the unitary evolution of states and information loss that is measured by an observer on the D3 brane. With the configurations of these kinds, the information loss is an apparent phenomenon: it is just a manifestation of the fact that the D3-observer does not have access to the "hair" of the D5 black brane.