Boundary state of superstring in open string channel

TL;DR

This paper derives the boundary state of superstring in the open string channel, providing explicit oscillator forms for fermion and ghost sectors, enhancing understanding of D-brane interactions in superconformal field theory.

Contribution

It introduces a new method to derive boundary states in the open string channel using conformal mappings, with explicit analytical oscillator forms for fermion and ghost sectors.

Findings

Explicit oscillator forms for fermion and ghost sectors obtained.

Comparison with numerical results confirms the validity of the derived boundary state.

Provides a framework for analyzing open string emission and absorption by D-branes.

Abstract

We derive boundary state of superstring in the open string channel. It describes the superconformal field theory of open string emission and absorption by D-brane. We define the boundary state by conformal mappings from upper half plane with operators inserted at two points corresponding to the corners of semi-infinite strip. We obtain explicit oscillator forms analytically for the fermion and superconformal ghost sectors. For the fermion sector we compare this with numerical result obtained by using naive boundary condition.