title: Hidden supersymmetry of domain walls and cosmologies.
abstract: We show that all domain-wall solutions of gravity coupled to scalar fields for which the world-volume geometry is Minkowski or anti-de Sitter admit Killing spinors, and satisfy corresponding first-order equations involving a superpotential determined by the solution. By analytic continuation, all flat or closed Friedmann-Lemaître-Robertson-Walker cosmologies are shown to satisfy similar first-order equations arising from the existence of "pseudo Killing" spinors.
authors.affiliation: Institute for Theoretical Physics, University of Amsterdam, The Netherlands.
authors.forename: Kostas
authors.initials: K
authors.lastname: Skenderis
authors.forename: Paul K
authors.initials: PK
authors.lastname: Townsend