Deformation of Curved BPS Domain Walls and Supersymmetric Flows on 2d K\"ahler-Ricci Soliton

TL;DR

This paper explores how curved BPS domain walls and supersymmetric vacua in 4D N=1 supergravity evolve when the scalar manifold is a K"ahler-Ricci soliton, revealing conditions for their existence and analyzing a specific model.

Contribution

It introduces the study of BPS domain walls on a K"ahler-Ricci soliton manifold and examines their evolution and vacuum structure in supergravity.

Findings

Vacua related to curved backgrounds may not always exist.

Evolution of quantities with respect to the soliton parameter τ.

A detailed analysis of a linear superpotential model.

Abstract

We consider some aspects of the curved BPS domain walls and their supersymmetric Lorentz invariant vacua of the four dimensional N=1 supergravity coupled to a chiral multiplet. In particular, the scalar manifold can be viewed as a two dimensional K\"ahler-Ricci soliton generating a one-parameter family of K\"ahler manifolds evolved with respect to a real parameter, $\tau$. This implies that all quantities describing the walls and their vacua indeed evolve with respect to $\tau$. Then, the analysis on the eigenvalues of the first order expansion of BPS equations shows that in general the vacua related to the field theory on a curved background do not always exist. In order to verify their existence in the ultraviolet or infrared regions one has to perform the renormalization group analysis. Finally, we discuss in detail a simple model with a linear superpotential and the K\"ahler-Ricci soliton considered as the Rosenau solution.