Article
Physics, Particles & Fields
Camille Eloy, Michele Galli, Emanuel Malek
Summary: In this study, we use the E(8(8)) exceptional field theory to construct a consistent truncation of IIB supergravity on S-3 x S(3) x S1, resulting in a maximal 3-dimensional N = 16 gauged supergravity containing the N = (4, 4) AdS(3) vacuum. We achieve this by adding a 7-form flux to the S(1) reduction of the dyonic E7(7) truncation on S-3 x S-3 previously constructed. Our truncation Ansatz includes a range of moduli breaking some or all of the supersymmetries in addition to the N = (4, 4) vacuum.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Michele Cicoli, Andreas Schachner, Pramod Shukla
Summary: This article investigates the problem of moduli stabilisation in superstring compactifications on Calabi-Yau orientifolds and provides novel insights into the F-term scalar potential. By considering superpotential contributions with different moduli dependences, we prove the existence of a no-scale structure for odd moduli and derive the exact expressions for the no-scale breaking effects. Finally, we calculate the Hessian for odd moduli and discuss potential phenomenological implications.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Bruno Valeixo Bento, Dibya Chakraborty, Susha Parameswaran, Ivonne Zavala
Summary: This article investigates various string-loop, warping, and curvature corrections in type IIB moduli stabilisation scenarios. By studying weakly-warped LVS de Sitter vacua, it is found that some corrections become less problematic and even helpful in reaching the weakly-warped parameter space. However, other corrections remain dangerous and require small numerical coefficients to preserve the consistency of the weakly-warped LVS de Sitter solution.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Federico Carta, Alessandro Mininno, Nicole Righi, Alexander Westphal
Summary: We elucidate various aspects of the physics of thraxions and study their stabilization in the context of KKLT and LVS setups. We find that the mass of the thraxion is suppressed by the throat warp factor and a non-vanishing thraxion vacuum expectation value induces a breaking of the imaginary self-duality condition. Additionally, we search for global models with multiple thraxions but encounter difficulties due to frozen conifold singularities in the Calabi-Yau orientifold. Hence, we propose a new database of CICY orientifolds that can accommodate thraxions.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Andres Anabalon, Miguel Chamorro-Burgos, Adolfo Guarino
Summary: This study constructs multi-parametric and analytic families of four-dimensional AdS(3) x R (Janus) and AdS(3) x R+ (Hades) solutions in the SO(8) gauged supergravity. These solutions are generally non-supersymmetric, involve non-trivial running scalars and preserve a U(1)(4) symmetry. Upon suitable adjustment of the free parameters, different patterns of (super) symmetry enhancement can occur.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
David Berman, Thomas Fischbacher, Gianluca Inverso
Summary: We analytically construct a new family of supersymmetric AdS(4) solutions with specific internal space and symmetry breaking features, and discuss their relevance using gravity theory and field theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Arthur Hebecker, Sascha Leonhardt
Summary: The paper discusses the problem of metastable SUSY breaking in the landscape and the challenge of SUSY breaking in the AdS context. It proposes breaking SUSY using multi-cosine-shaped axion potentials and considers the potential for violating the non-SUSY AdS conjecture in the KKLT context and the type-IIA setting of DGKT.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Adolfo Guarino, Minwoo Suh
Summary: We investigate supersymmetric flows in type IIB supergravity that preserve an SO(2, 2) space-time symmetry and asymptote to AdS(5)x S-5 at both endpoints. The flows are constructed as Janus-type Double-struck capital R x AdS(3) BPS domain-walls in the effective four-dimensional [SO(1, 1) x SO(6)] proportional to R-12 gauged maximal supergravity describing the massless sector of type IIB supergravity compactified on S-1 x S-5. The compactification includes an S-duality hyperbolic twist along the S-1 which, when combined with an appropriate choice of boundary conditions for the running scalars, generates special flows that develop an S-fold regime at their core, thus enhancing the space-time symmetry there to SO(2, 3). Via the AdS/CFT correspondence, the flows constructed here are conjectured to describe conformal interfaces in a circle compactification of N = 4 SYM4.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Thibaut Coudarchet, Fernando Marchesano, David Prieto, Mikel A. Urkiola
Summary: We analyze the tree-level potential of type IIB flux compactifications in warped Calabi-Yau orientifolds, in regions of weak coupling and moderately large complex structure. In this regime, we argue that vacua fall into three classes, for which one can push the analytic description of their features. Our findings provide analytic expressions for the vacuum expectation values and flux-induced masses of the axio-dilaton and complex structure fields in a large subclass of vacua, independently of the Calabi-Yau and the number of moduli. We show that supersymmetric vacua always contain flat directions, at least at this level of approximation. Our findings allow to generate vast ensembles of flux vacua in specific Calabi-Yau geometries, as we illustrate in a particular example.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Jacob Bardzell, Eduardo Gonzalo, Muthusamy Rajaguru, Danielle Smith, Timm Wrase
Summary: This article revisits flux compactifications of type IIB string theory on rigid Calabi-Yau manifolds. This relatively unexplored part of the string landscape contains many interesting four-dimensional solutions, and discusses how these solutions fit into the swampland conjectures.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Thomas W. Grimm, Erik Plauschinn, Damian van de Heisteeg
Summary: We propose a new strategy for studying complex-structure moduli stabilization in Type IIB and F-theory flux compactifications. By utilizing the tools of asymptotic Hodge theory, we determine vacua in any asymptotic regime of the complex-structure moduli space. In a leading approximation, we find that the moduli dependence of the vacuum conditions follows a polynomial behavior with a dependence given by sl(2)-weights of the fluxes. We provide a pedagogical introduction to the sl(2)-approximation and a step-by-step procedure for constructing the corresponding Hodge star operator. Our analysis of Calabi-Yau examples demonstrates the accuracy of the sl(2)-approximation and allows us to determine the behavior of the fluxes' tadpole contribution. Furthermore, we discuss the structure of vacuum loci and their relationship to swampland conjectures, specifically the realization of the linear scenario in view of the tadpole conjecture.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Erik Plauschinn
Summary: The study provides evidence for the correctness of the tadpole conjecture by analyzing statistical data, which indicates that not all complex-structure moduli can be stabilized by fluxes in string-theory compactifications with a large number of moduli.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Iosif Bena, Johan Blaback, Mariana Grana, Severin Lust
Summary: By analyzing examples such as K3xK3 and CP3 compactifications, we conjecture that it is not possible to stabilize all complex-structure moduli in F-theory using fluxes, which has implications for certain vacuum solutions.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Erik Plauschinn
Summary: In this note, the mass spectrum of type IIB flux compactifications is studied. The mass matrix for F-term vacua in four-dimensional N = 1 supergravity theories is discussed in general, and then specialized to type IIB Calabi-Yau orientifold compactifications with geometric and non-geometric fluxes. In this setting, F-term vacua are generally AdS4 vacua, and the conformal dimensions of operators dual to the scalar fields are computed. One-loop corrections to the complex-structure moduli space lead to real-valued conformal dimensions for the mirror-dual of the DGKT construction, while non-integer conformal dimensions are obtained for a more general flux configuration than the DGKT mirror. It is also argued that stabilizing the axio-dilaton and complex-structure moduli in asymptotic regions of moduli space by fluxes implies that at least one of the corresponding mass eigenvalues diverges.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Katrin Becker, Eduardo Gonzalo, Johannes Walcher, Timm Wrase
Summary: This article investigates Type IIB flux vacua based on Landau-Ginzburg models, providing insights into non-geometric and strongly-coupled string landscapes. By studying supersymmetric flux configurations, it is found that there are massless fields that are not all flat directions of the super-potential at higher order. Additionally, new supersymmetric 4d N = 1 Minkowski and AdS vacua are described and compared with other swampland conjectures.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Niccolo Cribiori, Christoph Roupec, Magnus Tournoy, Antoine Van Proeyen, Timm Wrase
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Astronomy & Astrophysics
Diego Gallego
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2020)
Article
Astronomy & Astrophysics
David Andriot, Paul Marconnet, Timm Wrase
Summary: This article discusses two newly discovered 10-dimensional supergravity de Sitter solutions and analyzes whether they can be promoted to classical string backgrounds. Despite some positive partial results, both solutions ultimately fail to simultaneously fulfill all requirements. The analysis emphasizes various subtleties and discusses the relation to the problem of scale separation.
Article
Physics, Particles & Fields
Niccolo Cribiori, Susha Parameswaran, Flavio Tonioni, Timm Wrase
Summary: The study of non-supersymmetric string theories may provide insights into why supersymmetry has not been observed in our universe, shedding light on an important aspect of the string landscape. Investigation into misaligned supersymmetry in closed-string theories reveals cancellations between bosons and fermions, even in non-supersymmetric scenarios. Similarly, the same cancellation is observed for open strings through the study of an anti-Dp-brane placed on top of an Op-plane in type II string theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Renata Kallosh, Andrei Linde, Timm Wrase, Yusuke Yamada
Summary: Sequestered inflation models are developed where inflation occurs along flat directions in supergravity models derived from type IIB string theory. By using flux potentials and nilpotent multiplets, the flat directions are lifted to phenomenological inflationary plateau potentials. The masses of heavy fields and the volume of extra dimensions change during inflation, but this does not affect the inflationary dynamics.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Renata Kallosh, Andrei Linde, Timm Wrase, Yusuke Yamada
Summary: Researchers constructed supergravity models that allow the separation of inflation phenomenology from Planckian energy scale physics, using two steps to achieve this goal.
FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Fabio Bacchini, Daniel R. Mayerson, Bart Ripperda, Jordy Davelaar, Hector Olivares, Thomas Hertog, Bert Vercnocke
Summary: By imaging the shadows of horizonless fuzzball geometries in four-dimensional string theory, researchers have found that the microstructure of these fuzzballs can trap light rays near their would-be horizons. This phenomenon can be used to distinguish between fuzzballs near the scaling limit, which exhibit shadow similar to black holes without the paradoxes of event horizons, and alternative models of black compact objects based on observations of shadow size and residual glow.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Particles & Fields
Niccolo Cribiori, Susha Parameswaran, Flavio Tonioni, Timm Wrase
Summary: This article investigates the finite perturbative corrections in non-supersymmetric strings and discusses their physical and mathematical properties through the interplay between modular invariance and misaligned supersymmetry.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Fien Apers, Miguel Montero, Thomas Van Riet, Timm Wrase
Summary: This study investigates the flux compactifications of massive IIA supergravity with O6 planes, examining the properties of AdS(3) and AdS(4) vacua and the potential dual CFT(2) and CFT(3) theories. Results show stability of AdS(3) vacua and the absence of integer dimensions for operators in the putative CFT2 dual theories.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Jacob Bardzell, Eduardo Gonzalo, Muthusamy Rajaguru, Danielle Smith, Timm Wrase
Summary: This article revisits flux compactifications of type IIB string theory on rigid Calabi-Yau manifolds. This relatively unexplored part of the string landscape contains many interesting four-dimensional solutions, and discusses how these solutions fit into the swampland conjectures.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Renata Kanosh, Andrei Linde, Timm Wrase, Yusuke Yamada
Summary: This article discusses the tachyonic instabilities caused by goldstino condensation in the Volkov-Akulov (VA) model, related supergravity models, and the KKLT model in string theory. The authors of [1] constructed a specific model with two unconstrained interacting chiral superfields that have linearly realized supersymmetry and an unstable vacuum state. However, it is shown that the UV limit of their model is discontinuous and the vacuum instability proposed in [1] is not relevant to the VA model, related supergravity models, and the KKLT construction.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
David Andriot, Paul Marconnet, Muthusamy Rajaguru, Timm Wrase
Summary: Classical flux compactifications are an important research field in string theory, providing a testing ground for various conjectures. This paper focuses on type II supergravity compactifications on 6d group manifolds towards 4d maximally symmetric spacetimes, and develops a code for automated calculations and analysis.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Katrin Becker, Eduardo Gonzalo, Johannes Walcher, Timm Wrase
Summary: This article investigates Type IIB flux vacua based on Landau-Ginzburg models, providing insights into non-geometric and strongly-coupled string landscapes. By studying supersymmetric flux configurations, it is found that there are massless fields that are not all flat directions of the super-potential at higher order. Additionally, new supersymmetric 4d N = 1 Minkowski and AdS vacua are described and compared with other swampland conjectures.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
N. Cribiori, D. Junghans, V. Van Hemelryck, T. Van Riet, T. Wrase
Summary: The study revisits AdS(4) flux vacua with scale separation in type II supergravity and M-theory, showing that massless IIA allows weakly and strongly coupled solutions with fine-tuned classical orientifold backreaction. Evidence is provided that strongly coupled solutions in 11D supergravity can be lifted to scale-separated and sourceless (but classically singular) geometries.
Article
Astronomy & Astrophysics
Kwinten Fransen, Rob Tielemans, Bert Vercnocke, Gideon Koekoek
Summary: Studying the potential reflection of radiation by black holes changes their quasi-normal mode structure and introduces phase shifts in the gravitational wave signal. This phase shift may be detectable with the Einstein Telescope in high signal-to-noise events, but cannot explore the Planck scale.