Results 81 to 90 of about 645 (142)

A new de Sitter solution with a weakly warped deformed conifold

Journal of High Energy Physics, 2021
We revisit moduli stabilisation for type IIB flux compactifications that include a warped throat region corresponding to a warped deformed conifold, with an anti-D3-brane sitting at its tip.
Bruno Valeixo Bento, Dibya Chakraborty, Susha Parameswaran, Ivonne Zavala   +3 more
doaj   +1 more source

On Convergence of a Family of Random Walks in the Infinite Dimensional Stiefel Manifold

International Journal of Mathematics and Mathematical Sciences, Volume 2026, Issue 1, 2026.
In this paper, we study random walks taking values in an infinite‐dimensional space—either a Hilbert space or an infinite‐dimensional manifold embedded in it, such as the Stiefel manifold. These random walks arise in problems in shape theory, particularly when stochastic optimization is applied.
Andrea C. G. Mennucci, Shikha Binwal
wiley   +1 more source

Scale separation from O-planes

Journal of High Energy Physics
Orientifold planes play a crucial role in flux compactifications of string theory, and we demonstrate their deep connection to achieving scale-separated solutions.
George Tringas, Timm Wrase
doaj   +1 more source

Compactifications of strata of differentials

Bulletin of the London Mathematical Society, Volume 57, Issue 12, Page 3621-3636, December 2025.
Abstract In this informal expository note, we quickly introduce and survey compactifications of strata of holomorphic 1‐forms on Riemann surfaces, that is, spaces of translation surfaces. In the last decade, several of these have been constructed, studied, and successfully applied to problems.
Benjamin Dozier
wiley   +1 more source

SO(32) heterotic standard model vacua in general Calabi-Yau compactifications

Journal of High Energy Physics, 2018
We study a direct flux breaking scenario in SO(32) heterotic string theory on general Calabi-Yau threefolds. The direct flux breaking, corresponding to hypercharge flux breaking in the F-theory context, allows us to derive the Standard Model in general ...
Hajime Otsuka, Kenta Takemoto
doaj   +1 more source

Dual spaces of geodesic currents

Journal of Topology, Volume 18, Issue 4, December 2025.
Abstract Every geodesic current on a hyperbolic surface has an associated dual space. If the current is a lamination, this dual embeds isometrically into a real tree. We show that, in general, the dual space is a Gromov hyperbolic metric tree‐graded space, and express its Gromov hyperbolicity constant in terms of the geodesic current.
Luca De Rosa, Dídac Martínez‐Granado
wiley   +1 more source

Fouling in Emulsion Polymerization: Fundamentals and Methods of Investigation

Journal of Applied Polymer Science, Volume 142, Issue 43, November 15, 2025.
ABSTRACT The current understanding of fouling in emulsion polymerization is summarized from an engineering perspective and from a physical‐chemistry perspective. Emulsion polymerization in semibatch mode offers better control over the number of particles and side reactions than batch mode. Both reaction fouling and particulate fouling are observed, the
Holly A. Huellemeier, Kevin M. Hoffmann, Olinda Sidorow, Stephan Scholl, Wolfgang Augustin, Diethelm Johannsmann   +5 more
wiley   +1 more source

de Sitter no-go’s for Riemann-flat manifolds and a link to semidefinite optimisation

Journal of High Energy Physics
We establish a no-go theorem in the context of string and M-theory flux compactifications on Riemann-Flat manifolds with Casimir energy. Specifically, we show that no dS minimum exists in this setup in dimension d > 3.
Bruno Valeixo Bento, Miguel Montero
doaj   +1 more source

Tunable holographic metasurfaces for augmented and virtual reality

Nanophotonics, Volume 14, Issue 23, Page 3813-3823, 02 November 2025.
Abstract Augmented and virtual reality (AR/VR) is transforming how humans interact with technology in a wide range of fields and industries, from healthcare and education to entertainment. However, current device limitations have impeded wider integration. Tunable holographic metasurfaces represent a promising platform for revolutionizing AR/VR devices
Akeshi Aththanayake, Andrew Lininger, Cataldo Strangi, Mark A. Griswold, Giuseppe Strangi   +4 more
wiley   +1 more source

On scale-separated supersymmetric $$\hbox {AdS}_2$$ AdS 2 flux vacua

European Physical Journal C: Particles and Fields
We argue that scale-separated $$\hbox {AdS}_2$$ AdS 2 vacua with at least two preserved supercharges cannot arise from flux compactifications in a regime of computational control.
Niccolò Cribiori, Fotis Farakos, Nikolaos Liatsos   +2 more
doaj   +1 more source