Results 11 to 20 of about 1,269 (172)

Unraveling the Role of Triplet-Triplet Annihilation and Photodegradation in Difluoroboron-Based Organic Laser Gain Materials. [PDF]

open access: yesAngew Chem Int Ed Engl
Amplified spontaneous emission (ASE) in difluoroboron‐based gain molecules is shown to originate from aggregated singlet states (S1), contradicting its previously assumed phosphorescent origin. Additionally, the delayed emission arises from a triplet–triplet annihilation upconversion (TTA‐UC) mechanism rather than a thermally activated (TADF) process ...
Kuila S   +6 more
europepmc   +3 more sources

Equiaffine Braneworld

open access: yesGalaxies, 2020
Higher dimensional theories, wherein our four dimensional universe is immersed into a bulk ambient, have received much attention recently, and the directions of investigation had, as far as we can discern, all followed the ordinary Euclidean hypersurface
Fan Zhang
doaj   +1 more source

A Carleman inequality on product manifolds and applications to rigidity problems

open access: yesAdvanced Nonlinear Studies, 2023
In this article, we prove a Carleman inequality on a product manifold M×RM\times {\mathbb{R}}. As applications, we prove that (1) a periodic harmonic function on R2{{\mathbb{R}}}^{2} that decays faster than all exponential rate in one direction must be ...
Sun Ao
doaj   +1 more source

A Note on Minimal Translation Graphs in Euclidean Space

open access: yesMathematics, 2019
In this note, we give a characterization of a class of minimal translation graphs generated by planar curves. Precisely, we prove that a hypersurface that can be written as the sum of n planar curves is either a hyperplane or a cylinder on the ...
Dan Yang, Jingjing Zhang, Yu Fu
doaj   +1 more source

Calibrated entanglement entropy

open access: yesJournal of High Energy Physics, 2017
The Ryu-Takayanagi prescription reduces the problem of calculating entanglement entropy in CFTs to the determination of minimal surfaces in a dual anti-de Sitter geometry.
I. Bakhmatov   +4 more
doaj   +1 more source

Chen’s Ricci inequalities and topological obstructions on null hypersurfaces of a Lorentzian manifold

open access: yesJournal of Inequalities and Applications, 2018
Given a null hypersurface of a Lorentzian manifold, we isometrically immerse a null hypersurface equipped with the Riemannian metric (induced on it by the rigging) into a Riemannian manifold suitably constructed on the Lorentzian manifold.
Karimumuryango Ménédore
doaj   +1 more source

A worldsheet approach to 𝒩 = 1 heterotic flux backgrounds

open access: yesJournal of High Energy Physics, 2023
Heterotic backgrounds with torsion preserving minimal supersymmetry in four dimensions can be obtained as orbifolds of principal T 2 bundles over K3. We consider a worldsheet description of these backgrounds as gauged linear sigma-models (GLSMs) with (0,
Dan Israël, Yann Proto
doaj   +1 more source

Fundamental tone of minimal hypersurfaces with finite index in hyperbolic space

open access: yesJournal of Inequalities and Applications, 2016
Let M be a complete minimal hypersurface in hyperbolic space H n + 1 ( − 1 ) $\mathbb {H}^{n+1}(-1)$ with constant sectional curvature −1. We prove that if M has a finite index and finite L 2 $L^{2}$ norm of the second fundamental form, then the ...
Keomkyo Seo
doaj   +1 more source

Minimal log discrepancies of hypersurface mirrors

open access: yesForum of Mathematics, Sigma
For certain quasismooth Calabi–Yau hypersurfaces in weighted projective space, the Berglund-Hübsch-Krawitz (BHK) mirror symmetry construction gives a concrete description of the mirror.
Louis Esser
doaj   +1 more source

On minimal hypersurfaces of nonnegatively Ricci curved manifolds

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1993
We consider a complete open riemannian manifold M of nonnegative Ricci curvature and a rectifiable hypersurface ∑ in M which satisfies some local minimizing property. We prove a structure theorem for M and a regularity theorem for ∑.
Yoe Itokawa
doaj   +1 more source

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