Flat World of Dilatonic Domain Walls

TL;DR

This paper investigates supersymmetric dilatonic domain walls in superstring theory, revealing solutions that interpolate between different vacua and resemble charged black holes, with implications for static and expanding bubble configurations.

Contribution

It presents new supersymmetric solutions for dilatonic domain walls that connect distinct string vacua, highlighting their flat metric and similarities to charged black holes.

Findings

Supersymmetric solutions interpolate between different vacua.

Dilaton and matter fields vary across the wall.

Solutions resemble charged dilatonic black holes.

Abstract

We study dilatonic domain walls specific to superstring theory. Along with the matter fields and metric the dilaton also changes its value in the wall background. We found supersymmetric (extreme) solutions which in general interpolate between isolated superstring vacua with non-equal value of the matter potential; they correspond to the static, planar domain walls with {\it flat} metric in the string (sigma model) frame. We point out similarities between the space-time of dilatonic walls and that of charged dilatonic black holes. We also comment on non-extreme solutions corresponding to expanding bubbles.