Classical p-branes from boundary state

TL;DR

This paper establishes a precise connection between boundary state descriptions of Dp-branes and their classical solutions in string theory, enabling extraction of physical properties like tension and charge from boundary states.

Contribution

It demonstrates how boundary states encode classical D-brane solutions and their physical characteristics, including R-R potentials, providing a direct link between boundary state formalism and supergravity solutions.

Findings

Boundary states reproduce D-brane tension and R-R charge.

Projection on massless states yields classical solution features.

Boundary states in R-R sector directly give gauge potentials.

Abstract

We show that the boundary state description of a Dp-brane is strictly related to the corresponding classical solution of the low-energy string effective action. By projecting the boundary state on the massless states of the closed string we obtain the tension, the R-R charge and the large distance behavior of the classical solution. We discuss both the case of a single D-brane and that of bound states of two D-branes. We also show that in the R-R sector the boundary state, written in a picture which treats asymmetrically the left and right components, directly yields the R-R gauge potentials.