Results 11 to 20 of about 20,364 (303)
Multiscale Contour Steered Region Integral and Its Application for Cultivar Classification
IEEE Access, 2019 In this paper, a multiscale contour steered region integral (MCSRI) method is proposed to classify highly similar shapes with flexible interior connection architectures.
Xiaohan Yu +3 more
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Fermionic Sign Problem Minimization by Constant Path Integral Contour Shifts
, 2023 The path integral formulation of quantum mechanical problems including fermions is often affected by a severe numerical sign problem. We show how such a sign problem can be alleviated by a judiciously chosen constant imaginary offset to the path integral.
Gäntgen, Christoph +4 more
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Targeting multi-loop integrals with neural networks
SciPost Physics, 2022 Numerical evaluations of Feynman integrals often proceed via a deformation of the integration contour into the complex plane. While valid contours are easy to construct, the numerical precision for a multi-loop integral can depend critically on the ...
Ramon Winterhalder, Vitaly Magerya, Emilio Villa, Stephen P. Jones, Matthias Kerner, Anja Butter, Gudrun Heinrich, Tilman Plehn
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Numerical contour integration for loop integrals [PDF]
Computer Physics Communications, 2006 A fully numerical method to calculate loop integrals, a numerical contour-integration method, is proposed. Loop integrals can be interpreted as a contour integral in a complex plane for an integrand with multi-poles in the plane. Stable and efficient numerical integrations an along appropriate contour can be performed for tensor integrals as well as ...
Yoshimi Kurihara, Toyohisa Kaneko
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SciPost Physics, 2023 The work fluctuation theorem (FT) is a symmetry connecting the moment generating functions (MGFs) of the work extracted in a given process and in its time-reversed counterpart.
Vasco Cavina, Sadeq S. Kadijani, Massimiliano Esposito, Thomas L. Schmidt
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Backpropagating Hybrid Monte Carlo algorithm for fast Lefschetz thimble calculations
Journal of High Energy Physics, 2022 The Picard-Lefschetz theory has been attracting much attention as a tool to evaluate a multi-variable integral with a complex weight, which appears in various important problems in theoretical physics.
Genki Fujisawa +3 more
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Numerical Inverse Transformation Methods for Z-Transform
Mathematics, 2020 Numerical inverse Z-transformation (NIZT) methods have been efficiently used in engineering practice for a long time. In this paper, we compare the abilities of the most widely used NIZT methods, and propose a new variant of a classic NIZT method based ...
Illés Horváth +2 more
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The quantum-mechanical Coulomb propagator in an L2 function representation
Scientific Reports, 2021 The quantum-mechanical Coulomb propagator is represented in a square-integrable basis of Sturmian functions. Herein, the Stieltjes integral containing the Coulomb spectral function as a weight is evaluated.
Rolf Gersbacher, John T. Broad
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Dynamics of contour integration
Vision Research, 2001 To determine the dynamics of contour integration the temporal properties of the individual contour elements were varied as well as those of the contour they form. A temporal version of a contour integration paradigm (Field, D. J., Hayes, A., & Hess, R. F.
Hess, Robert F. +2 more
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Bayesian contour integration [PDF]
Perception & Psychophysics, 2001 The process by which the human visual system parses an image into contours, surfaces, and objects--perceptual grouping--has proven difficult to capture in a rigorous and general theory. A natural candidate for such a theory is Bayesian probability theory, which provides optimal interpretations of data under conditions of uncertainty.
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