Results 101 to 110 of about 940,438 (233)

Fractional branes, warped compactifications and backreacted orientifold planes [PDF]

open access: yes, 2012
The standard extremal p-brane solutions in supergravity are known to allow for a generalisation which consists of adding a linear dependence on the world-volume coordinates to the usual harmonic function.
AR Frey   +38 more
core   +4 more sources

A lower bound on volumes of end‐periodic mapping tori

open access: yesJournal of Topology, Volume 18, Issue 3, September 2025.
Abstract We provide a lower bound on the volume of the compactified mapping torus of a strongly irreducible end‐periodic homeomorphism f:S→S$f: S \rightarrow S$. This result, together with work of Field, Kim, Leininger, and Loving [J. Topol. 16 (2023), no.
Elizabeth Field   +3 more
wiley   +1 more source

de Sitter vacua from nonperturbative flux compactifications [PDF]

open access: yes, 2013
In this work we present stable de Sitter solutions of =1 supergravity in a geometric type IIB duality frame with the addition of non-perturbative contributions.
J. Blaaback, D. Roest, I. Zavala
semanticscholar   +1 more source

Legendrian non‐isotopic unit conormal bundles in high dimensions

open access: yesJournal of Topology, Volume 18, Issue 3, September 2025.
Abstract For any compact connected submanifold K$K$ of Rn$\mathbb {R}^n$, let ΛK$\Lambda _K$ denote its unit conormal bundle, which is a Legendrian submanifold of the unit cotangent bundle of Rn$\mathbb {R}^n$. In this paper, we give examples of pairs (K0,K1)$(K_0,K_1)$ of compact connected submanifolds of Rn$\mathbb {R}^n$ such that ΛK0$\Lambda _{K_0}$
Yukihiro Okamoto
wiley   +1 more source

Symmetric fluxes and small tadpoles

open access: yesJournal of High Energy Physics, 2023
The analysis of type IIB flux vacua on warped Calabi-Yau orientifolds becomes considerably involved for a large number of complex structure fields.
Thibaut Coudarchet   +3 more
doaj   +1 more source

The embedding tensor of Scherk-Schwarz flux compactifications from eleven dimensions [PDF]

open access: yes, 2013
We study the Scherk-Schwarz reduction of D = 11 supergravity with background fluxes in the context of a recently developed framework pertaining to D = 11 supergravity.
H. Godazgar, M. Godazgar, H. Nicolai
semanticscholar   +1 more source

Moduli Stabilization and Cosmology of Type IIB on SU(2)-Structure Orientifolds [PDF]

open access: yes, 2010
We consider type IIB flux compactifications on six-dimensional SU(2)-structure manifolds with O5- and O7-planes. These six-dimensional spaces allow not only for F_3 and H_3 fluxes but also for F_1 and F_5 fluxes. We derive the four-dimensional N=1 scalar
A Achucarro   +92 more
core   +4 more sources

Two Micron‐Size Dark Dimensions

open access: yesFortschritte der Physik, Volume 73, Issue 8, August 2025.
Abstract Two extra dimensions of micron scale might simultaneously address the gauge and cosmological hierarchy problems. In this paper various observational bounds in scenarios with one and two large extra dimensions are examined, to see if they are compatible with the micron scale.
Luis A. Anchordoqui   +2 more
wiley   +1 more source

The Fluxed MSSM [PDF]

open access: yes, 2004
Recent developemnts in string compactifications in the presence of antisymmetric field backgrounds suggest a new simple and predictive structure for soft terms in the MSSM depending only on two parameters.
Ibanez, Luis E.
core   +2 more sources

DWSB for heterotic flux compactifications [PDF]

open access: yesFortschritte der Physik, 2011
AbstractWe investigate the construction of non‐supersymmetric vacua in compactifications of heterotic string theory with intrinsic torsion and background fluxes. We do this by using the technique of domain‐wall supersymmetry breaking (DWSB) that was developed in the context of type II compactifications.
openaire   +3 more sources

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