Results 21 to 30 of about 9,239 (185)

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

open access: green, 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.
Stéphane Maes
openalex   +3 more sources

Cosmological implications of domain walls due to duality invariant moduli sector of superstring vacua [PDF]

open access: greenPhysics Letters B, 1992
10p., 3 figures, not included, minor wording ...
Mirjam Cvetič, Richard L. Davis
openalex   +5 more sources

Geometry and Quantum Symmetries of Superstring Vacua [PDF]

open access: closed, 1992
We report on some recent progress which has been made in the understanding of general features of superstring compactifications. The following aspects are discussed: special geometry of the moduli space of (2,2) vacua, target-space duality symmetries, differential equations for the periods of holomorphic three-forms, and higher loop (genus) string ...
S. Ferrara
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Symmetries on the moduli space of (2,2) superstring vacua

open access: closedNuclear Physics B, 1991
Abstract Symmetries of 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 deformations of superpotentials.
Amit Giveon, Dirk-Jan Smith
openalex   +3 more sources

Conflicts with de Sitter Vacua in Superstring Theory

open access: diamondMcGill Science Undergraduate Research Journal
Models of our universe lack consistency at different energy scales, so we require a theory with ultraviolet (UV) completion such as string theory. A suitable candidate to model our universe in this framework is de Sitter space, a spacetime which expands and has positive curvature.
J. Morais
openalex   +2 more sources

Quaternionic manifolds for type II superstring vacua of Calabi-Yau spaces [PDF]

open access: closedNuclear Physics B, 1990
Abstract In type II theories compactified on Calabi-Yau manifolds the moduli fields are accompanied by (Ramond-Ramond) scalar superpartners. N = 2 space-time supersymmetry requires the low-energy effective mutual interaction of these excitations be described by a quaternionic σ-model in target space.
S. Ferrara, S. Sabharwal
openalex   +3 more sources

Branes with brains: exploring string vacua with deep reinforcement learning

open access: yesJournal of High Energy Physics, 2019
We propose deep reinforcement learning as a model-free method for exploring the landscape of string vacua. As a concrete application, we utilize an artificial intelligence agent known as an asynchronous advantage actor-critic to explore type IIA ...
James Halverson, Fabian Ruehle
exaly   +3 more sources

Systematic study of the SO(10) symmetry breaking vacua in the matrix model for type IIB superstrings [PDF]

open access: closedJournal of High Energy Physics, 2011
We study the properties of the space-time that emerges dynamically from the matrix model for type IIB superstrings in ten dimensions. We calculate the free energy and the extent of space-time using the Gaussian expansion method up to the third order.
Jun Nishimura   +2 more
openalex   +6 more sources

Explicit superstring vacua in a background of gravitational waves and dilaton [PDF]

open access: closedIl 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.
A. Peterman, A. Zichichi
openalex   +5 more sources

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