New de Sitter solutions of 10d type IIB supergravity
AbstractWe find and study 17 new de Sitter solutions of ten-dimensional (10d) type IIB supergravity with intersecting D5-branes and orientifold O5-planes, as well as a new Minkowski one. These...
View ArticleDyonic black hole degeneracies in N $$ \mathcal{N} $$ = 4 string theory from...
AbstractThe degeneracies of single-centered dyonic \( \frac{1}{4} \)-BPS black holes (BH) in Type II string theory on K3×T2 are known to be coefficients of certain mock Jacobi forms arising from the...
View ArticleNon-supersymmetric string models from anti-D3-/D7-branes in strongly warped...
AbstractThis article discusses model-building scenarios including anti-D3-/D7-branes, in which supersymmetry is broken spontaneously, despite having no scale at which sparticles appear and standard...
View ArticleMisaligned supersymmetry and open strings
AbstractThe study of non-supersymmetric string theories is shedding light on an important corner of the string landscape and might ultimately explain why, so far, we did not observe supersymmetry in...
View ArticleStandard model from a supergravity model with a naturally small cosmological...
AbstractGuided by the naturalness criterion for an exponentially small cosmological constant, we present a string theory motivated 4-dimensional \( \mathcal{N} \) = 1 non-linear supergravity model (or...
View ArticleModular invariance, misalignment and finiteness in non-supersymmetric strings
AbstractIn this article we show that finite perturbative corrections in non-supersymmetric strings can be understood via an interplay between modular invariance and misaligned supersymmetry. While...
View ArticleRepulsive black holes and higher-derivatives
AbstractIn two-derivative theories of gravity coupled to matter, charged black holes are self-attractive at large distances, with the force vanishing at zero temperature. However, in the presence of...
View ArticleComments on classical AdS flux vacua with scale separation
AbstractAdS flux vacua with a parametric separation between the AdS and KK scales have been conjectured to be in the Swampland. We study flux compactifications of massive IIA supergravity with O6...
View ArticleType IIB flux compactifications with h1,1 = 0
AbstractWe revisit flux compactifications of type IIB string theory on ‘spaces’ dual to rigid Calabi-Yau manifolds. This rather unexplored part of the string landscapes harbors many interesting...
View ArticleGoldstino condensation?
AbstractIt was argued in [1] that the Volkov-Akulov (VA) model as well as similar models in supergravity and the related KKLT model in string theory, suffer from tachyonic instabilities due to...
View ArticleAutomated consistent truncations and stability of flux compactifications
AbstractClassical flux compactifications contribute to a well-controlled corner of the string landscape, therefore providing an important testing ground for a variety of conjectures. We focus here on...
View ArticleFluxes, vacua, and tadpoles meet Landau-Ginzburg and Fermat
AbstractType IIB flux vacua based on Landau-Ginzburg models without Kähler deformations provide fully-controlled insights into the non-geometric and strongly-coupled string landscape. We show here that...
View ArticleA novel solution to the gravitino problem
AbstractIn a general phenomenological model with local supersymmetry, the amount of massive gravitinos produced in early universe tends to violate the known dark matter density bound by many orders of...
View ArticleDe Sitter versus Anti de Sitter flows and the (super)gravity landscape
AbstractGeneric solutions are studied in Einstein-scalar gravity in an ansatz that can interpolate between de Sitter and Anti-de Sitter regimes. The classification of regular solutions of [1, 2] is...
View ArticleOn asymptotic dark energy in string theory
AbstractWe examine bounds on accelerated expansion in asymptotic regions of the moduli space in string theory compactifications to four spacetime dimensions. While there are conjectures that forbid or...
View ArticleTowards Early Dark Energy in string theory
AbstractEarly Dark Energy (EDE) is a prominent model to resolve the Hubble tension, which employs a dynamical axion with a periodic potential. In this work, we take first steps towards the embedding of...
View ArticleTachyons and Misaligned Supersymmetry in orientifold vacua
AbstractWe extend the analysis of Misaligned Supersymmetry to orientifold vacua. The lack of modular invariance in the Klein bottle, annulus and Möbius strip amplitudes implies that the IR properties...
View ArticleOn fluxes in the 19 Landau-Ginzburg model
AbstractIn this paper we present a large class of flux backgrounds and solve the shortest vector problem in type IIB string theory on an orientifold of the 19 Landau-Ginzburg model.
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