Results 31 to 40 of about 808 (166)
On the stability of string theory vacua
Journal of High Energy Physics, 2022 Vacuum compactifications may suffer from instabilities under small perturbations or tunnel effects; both are difficult to analyze. In this paper we consider the issue from a higher-dimensional perspective.
Suvendu Giri +2 more
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Stable non-supersymmetric vacua in the moduli space of non-critical superstrings [PDF]
Nuclear Physics B, 2006 We study a set of asymmetric deformations of non-critical superstring theories in various dimensions. The deformations arise as Kaehler and complex structure deformations of an orthogonal two-torus comprising of a parallel and a transverse direction in the near-horizon geometry of NS5-branes.
Harmark, Troels +2 more
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On supersymmetric AdS4 orientifold vacua
Journal of High Energy Physics, 2020 In this work we study ten-dimensional solutions to type IIA string theory of the form AdS4 × X 6 which contain orientifold planes and preserve N $$ \mathcal{N} $$ = 1 supersymmetry.
Fernando Marchesano +3 more
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de Sitter vacua from ten dimensions
Journal of High Energy Physics, 2021 We analyze the de Sitter construction of [1] using ten-dimensional supergravity, finding exact agreement with the four-dimensional effective theory. Starting from the fermionic couplings in the D7-brane action, we derive the ten-dimensional stress-energy
Shamit Kachru +3 more
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Journal of High Energy Physics, 2020 We study non-perturbative instabilities of AdS spacetime in General Relativity with a cosmological constant in arbitrary dimensions. In this simple setup we explicitly construct a class of gravitational instantons generalizing Witten’s bubble of nothing.
Giuseppe Dibitetto +2 more
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Moduli stabilization in type IIB orientifolds at h2,1 = 50
Journal of High Energy Physics, 2023 We study moduli stabilization in Calabi-Yau orientifold compactifications of type IIB string theory with O3- and O7-planes. We consider a Calabi-Yau three-fold with Hodge number h 2,1 = 50 and stabilize all axio-dilaton and complex-structure moduli by ...
Konstantinos Tsagkaris, Erik Plauschinn
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Explicit superstring vacua in a background of gravitational waves and dilaton [PDF]
Il Nuovo Cimento A, 1995 We present an explicit solution of superstring effective equations, represented by gravitational waves and dilaton backgrounds. Particular solutions will be examined in a forthcoming note.
Petermann, A., Zichichi, A.
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The many vacua of gauged extended supergravities
, 2008 A novel method is presented which employs advanced numerical techniquesused in the engineering sciences to find and study the properties of nontrivialvacua of gauged extended supergravity models.
Thomas Fischbacher, Fischbacher, Thomas
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Duality and Integrability in Superstring and Gauge Field Theory [PDF]
, 2021 In the present thesis, we explore certain aspects of superstring and supersymmetric gauge field theory, independently as well as in the context of the holographic duality.The first part of the thesis is devoted to classical integrability and, in particular,
KONSTANTINOS FILIPPAS
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Symmetries on the Space of (2, 2) Superstring Vacua and Automorphism Groups of Calabi-Yau Manifolds [PDF]
Progress of Theoretical Physics Supplement, 1990 Symmetry groups on the space of (2,2) string vacua for c = 3,6,9 are discussed in the context of orbifoldized Landau-Ginzburg theories. A general method for finding the maximal symmetry groups on the moduli space of untwisted marginal operators is presented, by studying symmetries on the resolution of isolated singularities of superpotentials ...
Giveon, A., Smit, D.-J.
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