Results 121 to 130 of about 169,909 (330)
Inverse problems for Einstein manifolds [PDF]
arXiv, 2007 We show that the Dirichlet-to-Neumann operator of the Laplacian on an open subset of the boundary of a connected compact Einstein manifold with boundary determines the manifold up to isometries. Similarly, for connected conformally compact Einstein manifolds of even dimension $n+1$, we prove that the scattering matrix at energy $n$ on an open subset of
arxiv
Novel Method for Measuring Carrier Diffusion Lengths in Metal‐Halide Perovskites
physica status solidi (RRL) – Rapid Research Letters, EarlyView.The carrier diffusion length in metal‐halide perovskite films from approximate analysis of contactless quasi‐steady‐state photoconductance measurements is estimated. The technique is applied to two perovskite layers fabricated by wet‐chemical processing and coevaporation, respectively.
Benjamin Grimm +6 more
wiley +1 more source
On the Betti and Tachibana numbers of compact Einstein manifolds [PDF]
arXiv, 2019 Throughout the history of Einstein manifolds, differential geometers have shown great interest in finding the relationships between curvature and the topology of Einstein manifolds. In the paper, first, we prove that a compact Einstein manifold $(M,g)$ with Einstein constant $\alpha >0$ is a homo-logical sphere when the minimum of its sectional ...
arxiv
Advanced Quantum Technologies, EarlyView.Light–pulse atom interferometry with ultra‐cold quantum gases is proposed and numerically benchmarked as a competitive platform to test the modulo‐square hypothesis of Born's rule. The interferometric protocol utilizes a combination of double Bragg and single Raman diffraction pulses to induce multipath interference in Bose–Einstein condensates and ...
Simon Kanthak +3 more
wiley +1 more source
Einstein doubly warped product manifolds with a semi-symmetric metric connection [PDF]
arXiv, 2020 In this paper, we study the doubly warped product manifolds with semisymmetric metric connection. We derive the curvatures formulas for doubly warped product manifold with semi-symmetric metric connection in terms of curvatures of components of doubly warped product manifolds.
arxiv
Tailored Growth of Transition Metal Dichalcogenides’ Monolayers by Chemical Vapor Deposition
Small, EarlyView.Here, results on the tailored growth of various 2D semiconductors’ monolayers of transition metal dichalcogenides are presented using chemical vapor deposition techniques. Basic electronic, photonic and optoelectronic properties of the grown quantum materials are studied by high‐resolution microscopy and spectroscopy techniques and are analyzed for ...
Andrey Turchanin, Antony George
wiley +1 more source
Non-naturally reductive Einstein metrics on normal homogeneous Einstein manifolds [PDF]
arXiv, 2017 It is an important problem in differential geometry to find non-naturally reductive homogeneous Einstein metrics on homogeneous manifolds. In this paper, we consider this problem for some coset spaces of compact simple Lie groups. A new method to construct invariant non-naturally reductive Einstein metrics on normal homogeneous Einstein manifolds is ...
arxiv
Laplace operators on Sasaki-Einstein manifolds [PDF]
Journal of High Energy Physics, 2014 6 ...
openaire +4 more sources
Thermal Activation and Deactivation of Ni‐Doped Ceria Catalysts in CO2 Methanation
Small Science, EarlyView.This work investigates the influence of calcination temperature on the morphology, chemistry, and CO2 methanation activity of Ni‐doped ceria catalysts. Optimal calcination temperatures promote the exsolution of small Ni nanoparticles, leading to enhanced methanation activity by creating additional catalytically active sites. Discovered almost 130 years
Mathias Barreau +8 more
wiley +1 more source
Mathematics, 2019 In the present paper, we study conformal mappings between a connected n-dimension pseudo-Riemannian Einstein manifolds. Let g be a pseudo-Riemannian Einstein metric of indefinite signature on a connected n-dimensional manifold M.
Josef Mikeš +2 more
doaj +1 more source