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Hierarchies from fluxes in string compactifications

TLDR
In this article, the authors show that the hierarchy of scales can be fixed by a choice of Ramond-Ramond and Neveu-Schwarz fluxes in the compact manifold, and give examples involving orientifold compactifications of type IIB string theory and F-theory compactifications on Calabi-Yau fourfolds.
Abstract
Warped compactifications with significant warping provide one of the few known mechanisms for naturally generating large hierarchies of physical scales. We demonstrate that this mechanism is realizable in string theory, and give examples involving orientifold compactifications of type-IIB string theory and F-theory compactifications on Calabi-Yau fourfolds. In each case, the hierarchy of scales is fixed by a choice of Ramond-Ramond and Neveu-Schwarz fluxes in the compact manifold. Our solutions involve compactifications of the Klebanov-Strassler gravity dual to a confining $\mathcal{N}=1$ supersymmetric gauge theory, and the hierarchy reflects the small scale of chiral symmetry breaking in the dual gauge theory.

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Phenomenological aspects of no-scale inflation models

TL;DR: In this article, the authors discuss phenomenological aspects of no-scale supergravity inflationary models motivated by compactified string models, in which the inflaton may be identified either as a Kahler modulus or an untwisted matter field, focusing on models that make predictions for the scalar spectral index ns and the tensor-toscalar ratio r that are similar to the Starobinsky model.

TASI Lectures on Holographic Space-Time, SUSY and Gravitational Effective Field Theory

Tom Banks
TL;DR: In this paper, the authors argue that the conventional field theoretic notion of vacuum state is not valid in quantum gravity and introduce holographic space-time, a quasi-local quantum mechanical construction based on the holographic principle.
Journal ArticleDOI

String Corrections to the Holographic RG Flow of Supersymmetric SU(N) x SU(N+M) Gauge Theory

TL;DR: In this article, a leading tree-level string correction to the type IIB string effective action is represented by the invariant of the form $\a'{}^3 (R^4 +...)$ since the background contains 3-form field strengths.
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The effective action of warped M-theory reductions with higher derivative terms - Part I

TL;DR: In this paper, the authors studied the three-dimensional effective action obtained by reducing eleven-dimensional supergravity with higher-derivative terms on a background solution including a warp-factor, an eight-dimensional compact manifold, and fluxes.
Journal ArticleDOI

Dimensional mutation and spacelike singularities

TL;DR: In this article, the authors argue that critical string theory on a Riemann surface of genus h > 1 crosses over when the surface approaches the string scale in size, to a background of supercritical string theory with effective central charge as large as 2h.
References
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Journal ArticleDOI

The Large N limit of superconformal field theories and supergravity

TL;DR: In this article, it was shown that the large-N limits of certain conformal field theories in various dimensions include in their Hilbert space a sector describing supergravityon the product of anti-de Sitter spacetimes, spheres, and other compact manifolds.
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Large Mass Hierarchy from a Small Extra Dimension

TL;DR: In this paper, the weak scale is generated from the Planck scale through an exponential hierarchy, but this exponential arises not from gauge interactions but from the background metric, which is a slice of spacetime.
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An Alternative to compactification

TL;DR: In this paper, a single 3-brane embedded in five dimensions was shown to reproduce four-dimensional Newtonian and general relativistic gravity to more than adequate precision, even without a gap in the Kaluza-Klein spectrum.
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Supergravity and a confining gauge theory: duality cascades and χSB-resolution of naked singularities

TL;DR: In this article, a non-singular pure-supergravity background dual to the field theory on all scales, with small curvature everywhere if the ‘t Hooft coupling gsM is large, was proposed.
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Superconformal field theory on threebranes at a Calabi-Yau singularity

TL;DR: In this paper, it was shown that string theory on AdS5 × X5 can be described by a certain N = 1 supersymmetric gauge theory, which we describe in detail.
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