Results 121 to 130 of about 9,349 (162)

From Minkowski to de Sitter in multifield no-scale models

open access: yesJournal of High Energy Physics, 2019
We show the uniqueness of superpotentials leading to Minkowski vacua of single-field no-scale supergravity models, and the construction of dS/AdS solutions using pairs of these single-field Minkowski superpotentials.
John Ellis   +4 more
doaj   +1 more source

Generalised Penrose Limits and PP-Waves

open access: yes, 2004
In this paper we construct generalised Penrose limits for the solutions of massive type IIA supergravity. We consider a Freund-Rubin type solution and apply these {\it massive} Penrose limits and obtain supersymmetric pp-wave which is a standard type IIA
Aharony   +55 more
core   +1 more source

Abelian F-theory models with charge-3 and charge-4 matter

open access: yesJournal of High Energy Physics, 2018
This paper analyzes U(1) F-theory models admitting matter with charges q = 3 and 4. First, we systematically derive a q = 3 construction that generalizes the previous q = 3 examples.
Nikhil Raghuram
doaj   +1 more source

Static Domain Walls in N=1 Supergravity

open access: yes, 1992
We study supersymmetric domain walls in N=1 supergravity theories, including those with modular-invariant superpotentials arising in superstring compactifications. Such domain walls are shown to saturate the Bogomol'nyi bound of wall energy per unit area.
Abraham   +51 more
core   +1 more source

The String Swampland and de Sitter Vacua: A Consistent Perspective for Superstrings and Multi-fold Universes

open access: yes, 2023
In a multi-fold universe, gravity emerges from Entanglement through the multi-fold mechanisms. As a result, gravity-like effects appear in between entangled particles that they be real or virtual. Long range, massless gravity results from entanglement of massless virtual particles.
openaire   +1 more source

Black Holes, Branes and Superconformal Symmetry

open access: yes, 1999
The main focus of this lecture is on extended objects in adS*S bosonic backgrounds with unbroken supersymmetry. The backgrounds are argued to be exact, special consideration are given to the non-maximal supersymmetry case.
A. Galperin   +22 more
core   +1 more source

Uplifts of maximal supergravities and transitions to non-geometric vacua

open access: yesJournal of High Energy Physics, 2019
We describe a new procedure to obtain consistent backgrounds that uplift vacua and deformations of various maximal gauged supergravities by taking a known solution and performing singular limits along the moduli space of the corresponding 4-dimensional ...
Gianguido Dall’Agata   +2 more
doaj   +1 more source

String Field Theory Vertices for Fermions of Integral Weight

open access: yes, 2003
We construct Witten-type string field theory vertices for a fermionic first order system with conformal weights (0,1) in the operator formulation using delta-function overlap conditions as well as the Neumann function method.
A. Kling   +61 more
core   +1 more source

Extensions of a scale-separated AdS4 solution and their mass spectrum

open access: yesJournal of High Energy Physics
We consider two extensions of the so-called DGKT solution, a 4d scale-separated anti-de Sitter (AdS) solution obtained as a compactification on a 6d torus orbifold. Each extension consists in a specific large n expansion beyond the DGKT solution, where n
David Andriot, George Tringas
doaj   +1 more source

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