Results 21 to 30 of about 3,032,855 (327)
ana_cont: Python package for analytic continuation [PDF]
Computer Physics Communications, 2021 We present the Python package ana_cont for the analytic continuation of fermionic and bosonic many-body Green's functions by means of either the Pade approximants or the maximum entropy method.
J. Kaufmann, K. Held
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Robust analytic continuation approach to many-body GW calculations. [PDF]
Journal of Chemical Theory and Computation, 2019 The analytic continuation of the GW self-energy from the imaginary to the real energy axis is a central difficulty for approaches exploiting the favourable properties of response functions at imaginary frequencies.
I. Duchemin, X. Blase
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Analytic continuation for giant gravitons [PDF]
Progress of Theoretical and Experimental Physics, 2022 We investigate contributions of giant gravitons to the superconformal index. We concentrate on coincident giant gravitons wrapped around a single cycle, and each contribution is obtained by a certain variable change for fugacities from the index of the
Y. Imamura
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Quantifying the ill-conditioning of analytic continuation [PDF]
BIT Numerical Mathematics, 2019 Analytic continuation is ill-posed, but becomes merely ill-conditioned (although with an infinite condition number) if it is known that the function in question is bounded in a given region of the complex plane.
L. Trefethen
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Real-space diffusion theory from quantum mechanics using analytic continuation [PDF]
HeliyonWe show that a physical correspondence between Brownian motion and quantum mechanics can be established by formal analytic continuation if Wick rotation (t→it) is replaced by the mirror symmetric, complex conjugate time transformation t→±it.
Leonardo Di G. Sigalotti +2 more
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Inclusive B decay calculations with analytic continuation
EPJ Web of Conferences, 2018 First-principle lattice calculation of inclusive B meson semileptonic decays is possible for a certain class of moments that is connected to the structure function at unphysical kinematics by analytic continuation.
Hashimoto Shoji +4 more
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Artificial Neural Network Approach to the Analytic Continuation Problem. [PDF]
Physical Review Letters, 2018 Inverse problems are encountered in many domains of physics, with analytic continuation of the imaginary Green's function into the real frequency domain being a particularly important example. However, the analytic continuation problem is ill defined and
Romain Fournier +3 more
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Analytic continuation and numerical evaluation of the kite integral and the equal mass sunrise integral [PDF]
Nuclear Physics B, 2017 We study the analytic continuation of Feynman integrals from the kite family, expressed in terms of elliptic generalisations of (multiple) polylogarithms. Expressed in this way, the Feynman integrals are functions of two periods of an elliptic curve.
Christian Bogner +2 more
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Analytic Continuation with Padé Decomposition [PDF]
Chinese Physics Letters, 2017 The ill-posed analytic continuation problem for Green's functions or self-energies can be done using the Padé rational polynomial approximation. However, to extract accurate results from this approximation, high precision input data of the Matsubara Green's function are needed.
Han, Xing-Jie +5 more
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A test on analytic continuation of thermal imaginary-time data
European Physical Journal C: Particles and Fields, 2011 Some time ago, Cuniberti et al. have proposed a novel method for analytically continuing thermal imaginary-time correlators to real time, which requires no model input and should be applicable with finite-precision data as well.
Y. Burnier, M. Laine, L. Mether
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