Results 131 to 140 of about 863,168 (361)
Lower bounds for higher eigenvalues by finite difference methods [PDF]
, 1958 Hans F. Weinberger
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Advanced Science, EarlyView.Precise tuning of interlayer magnetic coupling in two‐dimensional bilayers enables control over altermagnetic and PT‐symmetric antiferromagnetic phases. This dual‐phase platform yields two intrinsic Hall responses: a Berry curvature–driven linear anomalous Hall effect and a quantum metric–induced second‐order nonlinear anomalous Hall effect ...
Zhenning Sun +5 more
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AIMS MathematicsUnderstanding the eigenvalue distribution of sequence Toeplitz matrices has advanced significantly in recent years. Notable contributors include Bogoya, Grudsky, Böttcher, and Maximenko, who have derived precise asymptotic expansions for these ...
Salima Kouser +6 more
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Advanced Science, EarlyView.A quantum kernel‐aligned regressor (QKAR) is developed for modeling Ohmic contact formation in GaN HEMT fabrication. Leveraging experimental data and a Pauli‐Z feature map enhanced with a quantum kernel alignment (QKA) layer, the model achieves superior predictive performance over classical methods.
Zeheng Wang +7 more
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On the Extended Adjacency Eigenvalues of a Graph
InformationLet H be a graph of order n with m edges. Let di=d(vi) be the degree of the vertex vi. The extended adjacency matrix Aex(H) of H is an n×n matrix defined as Aex(H)=(bij), where bij=12didj+djdi, whenever vi and vj are adjacent and equal to zero otherwise.
Alaa Altassan +2 more
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Realization of Spin‐locked Acoustic Helical Landau Levels in both Hexagonal and Square Lattices
Advanced Science, EarlyView.Acoustic helical Landau levels rooted in quantum spin Hall systems are achieved by linearly increasing the local bandgap through the lifting of the double Dirac cone in acoustic crystals. Large‐area conveyance of acoustic energy facilitated by these helical Landau levels is demonstrated.
Yafeng Chen +5 more
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On the distribution of the eigenvalues of a class of indefinite eigenvalue problems
Differential and Integral Equations, 1990 The authors consider boundary eigenvalue problems of the form \[ y^{(n)}(x)+\sum^ n_{\nu=2}f_ \nu(x)y^{(n-\nu)}(x)=\lambda r(x)y(x)\qquad (x\in[0,1]), \] \[ U_{\nu0}(y)+U_{\nu1}(y)=0\qquad (\nu=1,2,\dots,n), \] where \(n\geq 2\), the coefficients \(f_ \nu\) belong to \(L_ 1(0,1)\), \(r:[0,1]\to\mathbb{R}\backslash\{0\}\) is a step function, and the two-
Eberhard, W. +2 more
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Topological Singularities and Edge‐State Coupling Enable Robust on‐Chip Slow Light
Advanced Science, EarlyView.This work demonstrates the first experimental observation of a topological quantum‐interference‐like effect in a 1D on‐chip system, utilizing two topological mechanisms for robust slow light. Topological charges ensure immunity to parameter deviations, while edge states provide robustness against disturbances.
Yuqian Wang +6 more
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