Results 111 to 120 of about 748,632 (287)
Angewandte Chemie, EarlyView.The spin trapping agent DMPO reacts with nitrate radicals in non‐aqueous environment producing its oxidized adduct DMPOX. The peculiar EPR spectral features of DMPOX can be considered fingerprint of the presence of nitrate radicals. Results support in a more direct way the proposed generation and reactivity of nitrate radicals in heterogeneous ...
Alessia Zollo +5 more
wiley +2 more sources
Incorporation of New Information in an Approximate Hamiltonian [PDF]
arXiv, 2002 Additional information about the eigenvalues and eigenvectors of a physical system demands extension of the effective Hamiltonian in use. In this work we extend the effective Hamiltonian that describes partially a physical system so that the new Hamiltonian comprises, in addition to the information in the old Hamiltonian, new information, available by ...
arxiv
Hamiltonian systems in a neighborhood of a saddle point [PDF]
, 1978 Viorel Barbu
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Free‐space Optical Computing Systems
Annalen der Physik, EarlyView.Manipulation and propagation of optical wavefronts in free space enables new intelligent computing hardware. Two types of optical computing systems, matrix and vector multiplication systems and diffractive optical neural network systems, are reviewed from material, device, and system aspects.
Ruiyang Chen, Weilu Gao
wiley +1 more source
Numerical study of periodic Hamiltonian systems by means of associated point mappings [PDF]
, 1976 J. Bernussou, Liu Hsu
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Quantum‐Classical Simulation of Quantum Field Theory by Quantum Circuit Learning
Annalen der Physik, EarlyView.Quantum circuit learning is employed to simulate quantum field theories (QFTs). By integrating a minimal qubit configuration and low‐depth circuits, the approach predicts real‐time dynamics accurately. It effectively simulates complex phenomena such as quench and chiral dynamics in a model of quantum electrodynamics, aligning well with classical ...
Kazuki Ikeda
wiley +1 more source
Stochastic Hydrodynamic Velocity Field and the Representation of Langevin Equations
Annalen der Physik, EarlyView.A lumped method is proposed to account for both mean‐field hydrodynamics and stochastic fluctuations within the kinematic equations of motion, providing a regularized formulation of the overdamped approximation. The concept of stochastic realizability in broad sense is introduced based on the spectral properties of the Fredholm operator associated with
Massimiliano Giona +2 more
wiley +1 more source
Numerical Integration of Nearly-Hamiltonian Systems [PDF]
, 1978 Victor R. Bond
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System-bath decomposition of the reaction path Hamiltonian for polyatomic scattering: Quantum perturbative treatment [PDF]
, 1982 William H. Miller, Steven D. Schwartz
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Local biodiversity change reflects interactions among changing abundance, evenness, and richness
Ecology, Volume 103, Issue 12, December 2022., 2022 Abstract Biodiversity metrics often integrate data on the presence and abundance of multiple species. Yet our understanding of covariation between changes to the numbers of individuals, the evenness of species relative abundances, and the total number of species remains limited.
Shane A. Blowes +12 more
wiley +1 more source