Notes on D-branes in 2D Type 0 String Theory

TL;DR

This paper constructs and analyzes D-branes in 2D type 0 string theory, providing new descriptions and exploring their collective behavior via matrix models, revealing hidden sectors in strongly coupled regimes.

Contribution

It introduces a complete set of macroscopic operators for D-branes in 2D type 0 string theory and relates them to deformed Fermi surfaces and matrix models.

Findings

D-branes are represented as localized operators in time

A matrix model with a deformed potential describes continuous D-brane arrays

A new hidden sector emerges in the strongly coupled regime

Abstract

In this paper we construct complete macroscopic operators in two dimensional type 0 string theory. They represent D-branes localized in the time direction. We give another equivalent description of them as deformed Fermi surfaces. We also discuss a continuous array of such D-branes and show that it can be described by a matrix model with a deformed potential. For appropriate values of parameters, we find that it has an additional new sector hidden inside its strongly coupled region.