Results 51 to 60 of about 130,152 (295)
Advanced Materials, EarlyView.Compact, robust, and ultralow‐loss on‐chip photonic devices are essential for densely integrated photonic chips. Here, the underlying radiation mechanism in topological valley edge states is unveiled and a new methodology of interface topology driven bandgap and wavevector engineering is proposed to thoroughly suppress their radiation losses, thereby ...
Zhonglei Shen +6 more
wiley +1 more source
The Hydrogen Atom in Strong Electric Fields: Summation of the Weak Field Series Expansion
, 1995 The order dependent mapping method, its convergence has recently been proven for the energy eigenvalue of the anharmonic oscillator, is applied to re-sum the standard perturbation series for Stark effect of the hydrogen atom.
Alexander +22 more
core +2 more sources
Challenging eigenvalue perturbation problems
Linear Algebra and its Applications, 1998 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +3 more sources
Practical Considerations in the Design and Use of Non‐Crystalline Metal–Organic Frameworks
Advanced Materials, EarlyView.This review explores the emerging field of non‐crystalline MOFs ‐ amorphous, liquid, and glassy forms ‐ highlighting how they differ from traditional crystalline MOFs. It discusses their unique synthesis strategies, fundamental principles, and diverse applications.
Hamidreza Mahdavi +8 more
wiley +1 more source
AI‐Driven Defect Engineering for Advanced Thermoelectric Materials
Advanced Materials, EarlyView.This review presents how AI accelerates the design of defect‐tuned thermoelectric materials. By integrating machine learning with high‐throughput data and physics‐informed representations, it enables efficient prediction of thermoelectric performance from complex defect landscapes.
Chu‐Liang Fu +9 more
wiley +1 more source
Perturbation method for non-square Hamiltonians and its application to polynomial oscillators
, 2005 A remarkable extension of Rayleigh-Schroedinger perturbation method is found. Its (N+q) x (N+1) - dimensional Hamiltonians (as emerging, e.g., during quasi-exact constructions of bound states) are non-square matrices at q > 1.
Adhikari +50 more
core +1 more source
Néel Tensor Torque in Polycrystalline Antiferromagnets
Advanced Materials, EarlyView.This work introduces a Néel tensor torque based on a rank‐two symmetric tensor capturing spin correlations in a polycrystalline antiferromagnet. It shows the Néel tensor can be shaped and reshaped through the spin‐orbit torque (SOT) technique, enabling field‐free SOT switching with a specific polarity of the adjacent ferromagnet. This discovery opens a
Chao‐Yao Yang +4 more
wiley +1 more source
Signatures of three coalescing eigenfunctions
, 2011 Parameter dependent non-Hermitian quantum systems typically not only possess eigenvalue degeneracies, but also degeneracies of the corresponding eigenfunctions at exceptional points.
Demange, Gilles, Graefe, Eva-Maria
core +2 more sources
Eigenvalues of perturbed Hermitian matrices
Linear Algebra and its Applications, 1974 AbstractIt is a common experience that the perturbation, or even the omission, of some elements of a matrix often has negligible effect on some of the eigenvalues of the whole matrix. Here some new theorems are presented on this isolation effect in Hermitian matrices.
openaire +3 more sources
Advanced Optical Materials, EarlyView.Omni‐polarizers that pull all input polarization states to an elliptical or linear polarization can be made using highly resonant bi‐layer metasurfaces. The ellipticity of the selected polarization can be controlled by choosing the layer separation.
Ben Goldberg +2 more
wiley +1 more source