Boundary Super-Deformations, Boundary States, and Tachyon Condensation

TL;DR

This paper investigates boundary deformations in superstring theory, focusing on boundary states and tachyon condensation effects on D-branes using a path integral approach, revealing novel results in NSNS and RR sectors.

Contribution

It introduces a new method to compute boundary states with supersymmetrized actions and explores the impact of tachyon condensation, differing from previous findings.

Findings

Generalized boundary states derived using supersymmetrized boundary actions

Disk partition functions affected by tachyon condensation in NSNS and RR sectors

Results show deviations from established theories on boundary deformations

Abstract

The open string tachyon and U(1) gauge field as longitudinal fluctuations and the velocity as transverse fluctuation of an arbitrary dimensional D-brane are considered as boundary deformations of a closed superstring free action. The path integral approach will be applied to calculate the corresponding generalized boundary states using supersymmetrized boundary actions. Obtaining the disk partition functions from the boundary states and studying the effect of tachyon condensation on both of them in the NSNS and RR sectors, leads to results that differ from the established ones.