Results 41 to 50 of about 27,946 (159)
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
doaj +1 more source
Cosmological implications of domain walls due to duality invariant moduli sector of superstring vacua [PDF]
, 1992 We study cosmological implications of the duality (PSL(2, Z )) invariant potential for the compactification radius T, arising in a class of superstring vacua. We show that in spite of having only one minimum in the fundamental domain of the T field there
M. Cvetič, R. Davis
semanticscholar +1 more source
Spinor-Vector Duality in Heterotic SUSY Vacua
, 2008 28 pages, 6 tablesWe elaborate on the recently discovered spinor-vector duality in realistic free fermionic heterotic vacua. We emphasize the interpretation of the freely-acting orbifolds carried out on the six internal dimensions as coordinate-dependent
Kounnas, Costas +3 more
core +3 more sources
Eluding SUSY at every genus on stable closed string vacua. [PDF]
, 2011 In closed string vacua, ergodicity of unipotent ows provide a key for relat-ing vacuum stability to the UV behavior of spectra and interactions. Infrared finiteness at all genera in perturbation theory can be rephrased in terms of cancelations involving ...
Matteo A. Cardella +5 more
core +1 more source
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
doaj +1 more source
Uplifts of maximal supergravities and transitions to non-geometric vacua
Journal 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
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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Weakly coupled de Sitter vacua with fluxes and the swampland
Journal of High Energy Physics, 2019 It was recently argued that the swampland distance conjecture rules out dS vacua at parametrically large field distances. We point out that this conclusion can in principle be avoided in the presence of large fluxes that are not bounded by a tadpole ...
Daniel Junghans
doaj +1 more source
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
doaj +1 more source
Conflicts with de Sitter Vacua in Superstring Theory
McGill Science Undergraduate Research JournalModels 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 ...
J. Morais
semanticscholar +1 more source