A5007516101- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nonlinear Waves and Solitons
- Noncommutative and Quantum Gravity Theories
- Geometry and complex manifolds
- Advanced Algebra and Geometry
- Algebraic structures and combinatorial models
- Geometric and Algebraic Topology
- Galaxies: Formation, Evolution, Phenomena
- Physics of Superconductivity and Magnetism
- Neutrino Physics Research
- Algebraic Geometry and Number Theory
- Geometric Analysis and Curvature Flows
- Pulsars and Gravitational Waves Research
- Geophysics and Gravity Measurements
- Homotopy and Cohomology in Algebraic Topology
- Astrophysical Phenomena and Observations
- Advanced Topics in Algebra
- Dark Matter and Cosmic Phenomena
- High-pressure geophysics and materials
- Computational Physics and Python Applications
- Quantum, superfluid, helium dynamics
- Methane Hydrates and Related Phenomena
Central University of Venezuela
2010-2022
Max Planck Institute for Gravitational Physics
2008-2021
Max Planck Institute for Physics
2015-2017
Heidelberg Institute for Theoretical Studies
2017
Fermi National Accelerator Laboratory
2017
University of Chicago
2017
Ludwig-Maximilians-Universität München
2015
Universidad Autónoma de Madrid
2004-2008
Humboldt-Universität zu Berlin
2001
University of the Andes
1997-1999
Target-space duality symmetries are present in many static string vacua studied up to now. They conjectured remain unbroken even after non-perturbative effects taken into account. If that is the case, one can have a handle on by requiring explicit invariance of low-energy effective lagrangian. As an example we general discussion four-dimensional supergravity action consistent with target-space modular symmetry SL(2,Z). The superpotential severely distorts classical, solutions. Specifically,...
A bstract The Swampland Distance Conjecture states that at infinite distance in the scalar moduli space an tower of particles become exponentially massless. We study this issue context 4d type IIA and IIB Calabi-Yau compactifications. find for large not only towers but also domain walls strings tensionless. detail case 𝒩 = 1 CY orientifolds show how Kähler and/or complex structure tensionless, depending on particular direction space. For we construct monodromy orbits detail. mass scales...
Tree-level moduli stabilization via geometric and non-geometric fluxes in type IIB orientifolds on Calabi–Yau manifolds is investigated. The focus stable non-supersymmetric minima, where all are fixed except for some massless axions. scenario includes the purely axionic orientifold-odd moduli. A set of vacua allowing parametric control over vacuum expectation values their masses presented, featuring a specific scaling with fluxes. Uplift mechanisms supersymmetry breaking soft MSSM-like...
A bstract Compactifications of the heterotic string on T d are simplest, yet rich enough playgrounds to uncover swampland ideas: U(1) +16 left-moving gauge symmetry gets enhanced at special points in moduli space only certain groups. We state criteria, based lattice embedding techniques, establish whether a group is realized or not. For generic , we further show how obtain that lead given by modifying method deleting nodes extended Dynkin diagram Narain II 1 17 . More general algorithms...
A bstract We conjecture that in a consistent supergravity theory with non-vanishing gravitino mass, the limit m 3 / 2 → 0 is at infinite distance. In particular one can write M tower ~ $$ {m}_{3/2}^{\delta } <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>m</mml:mi> <mml:mrow> <mml:mn>3</mml:mn> <mml:mo>/</mml:mo> <mml:mn>2</mml:mn> </mml:mrow> <mml:mi>δ</mml:mi> </mml:msubsup> </mml:math> so as mass goes to zero, of KK states well emergent strings becomes...
It is shown that Starobinsky-like potentials can be realized in non-geometric flux compactifications of string theory, where the inflaton involves an axion whose shift symmetry protect UV-corrections to scalar potential. For purpose we evaluate backreacted, uplifted F-term axion-monodromy potential, which interpolates between a quadratic and form. Limitations due requirements having controlled approximation UV theory realizing single-field inflation are discussed.
Non-geometric flux-scaling vacua provide promising starting points to realize axion monodromy inflation via the F-term scalar potential. We show that these can be uplifted Minkowski and de Sitter by adding an anti D3-brane or a D-term containing geometric non-geometric fluxes. These non-supersymmetric models are analyzed with respect their potential self-consistently. Admitting rational values of fluxes, we construct examples required hierarchy mass scales.
A bstract We study the separation of AdS and Kaluza-Klein (KK) scales in type II 4d orientifold vacua. first address this problem toroidal/orbifold IIA vacua with metric fluxes, corresponding to compactifications twisted tori, both from 10d points view. show how naive application effective theory leads results which violate distance conjecture, a class $$ \mathcal{N} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>N</mml:mi></mml:math> = 1 supersymmetric models have lifting...
We consider toroidal asymmetric orbifolds of the heterotic string preserving all 16 supercharges, developing a general formalism to study components moduli space characterized by rank reduction gauge group. In particular we construct six- and four-dimensional islands with no massless other than dilaton. The involves Leech lattice, its automorphisms their corresponding invariant normal, or coinvariant, sublattices.