Results 51 to 60 of about 29,467 (233)
Numerical metrics, curvature expansions and Calabi-Yau manifolds
Journal of High Energy Physics, 2020 We discuss the extent to which numerical techniques for computing approximations to Ricci-flat metrics can be used to investigate hierarchies of curvature scales on Calabi-Yau manifolds.
Wei Cui, James Gray
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The embedding of the spacetime in five-dimensional spaces with arbitrary non-degenerate Ricci tensor [PDF]
, 2001 We discuss and prove a theorem which asserts that any n-dimensional semi-Riemannian manifold can be locally embedded in a (n+1)-dimensional space with a non-degenerate Ricci tensor which is equal, up to a local analytic diffeomorphism, to the Ricci ...
Andrianapoli L. +10 more
core +2 more sources
Methods of holonomy theory for Ricci-flat Riemannian manifolds [PDF]
Journal of Mathematical Physics, 1991 Compact, Ricci-flat Riemannian manifolds often arise in physical applications, either as a technical device or as models of ‘‘internal’’ space. The idea of extending the holonomy group of such a manifold to a larger gauge group (‘‘embedding the connection in the gauge group’’) plays a fundamental role in the ‘‘manifold compactification’’ approach to ...
openaire +2 more sources
On the possibility of a novel (A)dS/CFT relationship emerging in Asymptotic Safety
Journal of High Energy Physics, 2022 Quantum Einstein Gravity (QEG), nonperturbatively renormalized by means of a certain asymptotically safe renormalization group (RG) trajectory, is explored by solving its scale dependent effective field equations and embedding the family of emerging 4 ...
Renata Ferrero, Martin Reuter
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On the geometry of generalized nonholonomic Kenmotsu manifolds
Дифференциальная геометрия многообразий фигур, 2022 The concept of a generalized nonholonomic Kenmotsu manifold is introduced. In contrast to the previously defined nonholonomic Kenmotsu manifold, the manifold studied in the article is an almost normal almost contact metric manifold of odd rank.
A.V. Bukusheva
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A study on W9-curvature tensor within the framework of Lorentzian para-Sasakian manifold
Extracta MathematicaeThis article focuses on the study of Lorentzian para-Sasakian manifolds Mn . It demonstrates that a W9-semisymmetric Lorentzian para-Sasakian manifold is a W9-flat manifold.
G.P. Singh, S.S. Mishra, P. Sharma
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Conformal invariance of (0, 2) sigma models on Calabi-Yau manifolds
Journal of High Energy Physics, 2018 Long ago, Nemeschansky and Sen demonstrated that the Ricci-flat metric on a Calabi-Yau manifold could be corrected, order by order in perturbation theory, to produce a conformally invariant (2, 2) nonlinear sigma model.
Ian T. Jardine, Callum Quigley
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Journal of High Energy Physics, 2020 We study two-dimensional weighted N $$ \mathcal{N} $$ = (2) supersymmetric ℂℙ models with the goal of exploring their infrared (IR) limit. 𝕎ℂℙ(N, N ˜ $$ \tilde{N} $$ ) are simplified versions of world-sheet theories on non-Abelian strings in four ...
Jin Chen +4 more
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Anti-de Sitter massless scalar field spacetimes in arbitrary dimensions
, 2012 We consider $d$-dimensional static spacetimes in Einstein gravity with a cosmological constant in the presence of a minimally coupled massless scalar field.
Cristián Martínez +5 more
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Diffusion–Model–Driven Discovery of Ferroelectrics for Photocurrent Applications
Advanced Science, EarlyView.We developed a diffusion model–based generative AI and high‐throughput screening framework that accelerates the discovery of photovoltaic ferroelectrics. By coupling AI driven crystal generation with machine learning and DFT screening, we identified Ca3P2 and LiCdP as new ferroelectric materials exhibiting strong polarization, feasible switching ...
Byung Chul Yeo +3 more
wiley +1 more source