On the Question of the Scattering Matrix in Quantum Field Theory
Sign Up to like & getrecommendations! Published in 2017 at "Russian Physics Journal"
DOI: 10.1007/s11182-017-1077-8
Abstract: A new expression for the scattering matrix in local quantum field theory is obtained on the basis of a generalized formulation of the microcausality condition. This expression is relativistically covariant, unitary, and causal and coincides… read more here.
Keywords: quantum field; question scattering; matrix quantum; field theory ... See more keywords
A polarized scanning nephelometer for measurement of light scattering of an ensemble-averaged matrix of aerosol particles
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Quantitative Spectroscopy and Radiative Transfer"
DOI: 10.1016/j.jqsrt.2020.107497
Abstract: Abstract A new instrument, the Polarized Scanning Nephelometer (PSN), has been developed for measuring the complete scattering matrix of aerosol particles as a function of the scattering angle. The instrument measures directly the ensemble-averaged scattering… read more here.
Keywords: scanning nephelometer; matrix aerosol; aerosol particles; matrix ... See more keywords
Resonant mode approximation of the scattering matrix of photonic crystal slabs near several Wood-Rayleigh anomalies
Sign Up to like & getrecommendations! Published in 2022 at "Photonics and Nanostructures - Fundamentals and Applications"
DOI: 10.1016/j.photonics.2022.101015
Abstract: The resonant mode approximation of the scattering matrix is considered for calculating the optical properties of multilayered periodic structures within the formalism of the Fourier-modal method for two diffraction thresholds in close proximity of the… read more here.
Keywords: mode approximation; matrix photonic; resonant mode; approximation ... See more keywords
Application of MUSIC algorithm in real-world microwave imaging of unknown anomalies from scattering matrix
Sign Up to like & getrecommendations! Published in 2021 at "Mechanical Systems and Signal Processing"
DOI: 10.1016/j.ymssp.2020.107501
Abstract: Abstract In this contribution, we consider MUltiple SIgnal Classification (MUSIC)-type algorithm for a non-iterative microwave imaging of small and arbitrary shaped extended anomalies located in a homogeneous media from scattering matrix whose elements are scattering… read more here.
Keywords: music algorithm; microwave imaging; application music; scattering matrix ... See more keywords
Terahertz waves propagation in an inhomogeneous plasma layer using the improved scattering-matrix method
Sign Up to like & getrecommendations! Published in 2020 at "Waves in Random and Complex Media"
DOI: 10.1080/17455030.2020.1757177
Abstract: ABSTRACT The interaction between electromagnetic (EM) waves and plasma has been extensively investigated by the scattering-matrix method (SMM), but this method encounters the singularity problem, which is a numerical issue when the plasma density is… read more here.
Keywords: waves propagation; matrix method; method; plasma ... See more keywords
Determining the Projected Crystal Structure from Four-dimensional Scanning Transmission Electron Microscopy via the Scattering Matrix
Sign Up to like & getrecommendations! Published in 2023 at "Microscopy and Microanalysis"
DOI: 10.1093/micmic/ozad018
Abstract: We present a gradient-descent-based approach to determining the projected electrostatic potential from four-dimensional scanning transmission electron microscopy measurements of a periodic, crystalline material even when dynamical scattering occurs. The method solves for the scattering matrix… read more here.
Keywords: structure; four dimensional; microscopy; determining projected ... See more keywords
Point-coupling Hamiltonian for frequency-independent linear optical devices
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review A"
DOI: 10.1103/physreva.100.043827
Abstract: We present the point-coupling Hamiltonian as a model for broadband linear optical devices acting on propagating optical modes described as a continua of harmonic oscillators. We formally integrate the Heisenberg equations of motion for this… read more here.
Keywords: coupling hamiltonian; optical devices; point coupling; linear optical ... See more keywords
Use of transmission and reflection complex time delays to reveal scattering matrix poles and zeros: Example of the ring graph.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.105.054210
Abstract: We identify the poles and zeros of the scattering matrix of a simple quantum graph by means of systematic measurement and analysis of Wigner, transmission, and reflection complex time delays. We examine the ring graph… read more here.
Keywords: time; graph; complex time; poles zeros ... See more keywords
Moving Target’s Scattering Matrix Estimation With a Polarimetric Radar
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Geoscience and Remote Sensing"
DOI: 10.1109/tgrs.2020.2966905
Abstract: This article addresses the polarization scattering matrix (PSM) estimation problem of a point-like moving target. For the alternating measurement scheme, the radial displacement of the target would generate an additional phase error between two columns… read more here.
Keywords: pol; target; measurement selection; estimation ... See more keywords
Complex frequency analysis of the scattering matrix for the design of perfect absorbers in reflection and transmission problems.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of the Acoustical Society of America"
DOI: 10.1121/1.5067771
Abstract: The design of deep-subwavelength structures for low frequency sound perfect absorption is challenging. Subwavelength perfect absorption implies increasing of the density of states at low frequency while maintaining impedance matching to the surrounding medium. Therefore,… read more here.
Keywords: frequency; transmission problems; scattering matrix; low frequency ... See more keywords
Scattering Matrix of the One-Dimensional Schrödinger Equation with Arbitrary Potential
Sign Up to like & getrecommendations! Published in 2017 at "Journal of the Physical Society of Japan"
DOI: 10.7566/jpsj.86.114002
Abstract: This article presents a new highly accurate and efficient method to determine the scattering matrix (SM) of one-dimensional Schrodinger equations with arbitrary potentials. The method allows iterative computation of one SM in terms of the… read more here.
Keywords: dinger equation; dimensional schr; matrix one; one dimensional ... See more keywords