Intersecting D-branes and black holes in type 0 string theory

TL;DR

This paper explores intersecting D-branes in type 0 string theory, revealing their geometric properties, stability, and entropy calculations, and compares them to type II theories, providing insights into their dual conformal field theories.

Contribution

It demonstrates that intersecting D-branes in type 0 theories follow similar rules as in type II, and details the geometry, stability, and entropy of specific brane systems.

Findings

Near-horizon geometry is $AdS_3\times S^3\times T^4$ with no tachyon instability.

Bekenstein-Hawking entropy matches dual conformal field theory calculations.

Worldvolume theory includes bosons and fermions, derived from a projection of supersymmetric gauge theory.

Abstract

We study intersecting D-branes in type 0 string theories and show that the D$p_{\pm}$-brane bound states obey similar intersecting rules as the D$p$-branes of the type II theories. The D$5_{\pm}$-D$1_{\pm}$ brane system is studied in detail. We show that the corresponding near-horizon geometry is the $AdS_3\times S^3\times T^4$ space and that there is no tachyon instability in this background. The Bekenstein-Hawking entropy is calculated. The worldvolume theory on the D$5_{\pm}$-D$1_{\pm}$ system is also studied. This theory contains both bosons and fermions and it is seen to arise as a projection of the supersymmetric gauge theory related to the D5-D1 system of the type IIB theory. The Bekenstein-Hawking entropy formula is reproduced exactly using the dual conformal field theory.