Results 81 to 90 of about 130,152 (295)
Perturbations of embedded eigenvalues for the planar bilaplacian
Journal of Functional Analysis, 2011 Operators on unbounded domains may acquire eigenvalues that are embedded in the essential spectrum. Determining the fate of these embedded eigenvalues under small perturbations of the underlying operator is a challenging task, and the persistence properties of such eigenvalues is linked intimately to the multiplicity of the essential spectrum.
Derks, G, Maad Sasane, S, Sandstede, B
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A note on eigenvalues of perturbed Hermitian matrices [PDF]
Linear Algebra and its Applications, 2005 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ren-Cang Li, Chi-Kwong Li
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Phase‐Space Generalized Brillouin Zone For Spatially Inhomogeneous Non‐Hermitian Systems
Advanced Science, EarlyView.A novel phase‐space generalized Brillouin zone (GBZ) framework to devised captures the interplay of spatial inhomogeneity and non‐local non‐Hermitian effects. This reveals new degrees of freedom such as jumps in the bifurcated GBZ, as well as new routes for topological protection, with potential applications in characterizing inhomogeneous or ...
Qingya Li, Hui Jiang, Ching Hua Lee
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Advanced Science, EarlyView.A switchable bidirectional acoustic metastructure is proposed, enabling broadband and frequency‐selective absorption via interleaved resonator coupling and exceptional point modulation. It outperforms traditional unidirectional designs, offering compact, efficient sound control from both directions and establishing a generalized framework for extending
Zichao Guo +7 more
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Application for a Novel Perturbation Expansion Method
Journal of Algorithms & Computational Technology, 2009 We formulate a coupled vibration problem between a structure and an acoustic field by FEM (finite element methods). The problem leads to a nonstandard eigenvalue problem.
Li Deng +4 more
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Advanced Energy Materials, EarlyView.A unified analytical model is developed to consistently interpret the steady‐state and small‐perturbation response of photoanodes, both in the time and frequency domain. By accounting for non‐ideal electron extraction and slow hole kinetics, the model explains key experimental trends in the case of a hematite photoanode and allows extraction of related
Paola Ragonese +4 more
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Jacobians and rank 1 perturbations relating to unitary Hessenberg matrices [PDF]
, 2005 In a recent work Killip and Nenciu gave random recurrences for the characteristic polynomials of certain unitary and real orthogonal upper Hessenberg matrices. The corresponding eigenvalue p.d.f.'s are beta-generalizations of the classical groups.
Forrester, Peter J., Rains, Eric M.
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The Fate of the Landau Levels under Perturbations of Constant Sign
, 2009 We show that the Landau levels cease to be eigenvalues if we perturb the 2D Schr\"odinger operator with constant magnetic field, by bounded electric potentials of fixed sign.
Klopp, Frédéric, Raikov, Georgi
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Aggregate, EarlyView.This study developed a rapid, in situ, and derivatization‐free detection system for 3‐MCPD in paper‐based food contact materials, based on molecular imprinting and quartz crystal microbalance sensing technologies, achieving a detection limit of 0.006 µM and reducing analysis time by 75% compared to traditional methods.
Jinwei Zhao +10 more
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Observing Quantum Tunneling in Perturbation Series
, 1996 We apply Borel resummation method to the conventional perturbation series of ground state energy in a metastable potential, $V(x)=x^2/2-gx^4/4$. We observe numerically that the discontinuity of Borel transform reproduces the imaginary part of energy ...
't Hooft +38 more
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