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pro vyhledávání: '"Matsubara, A."'
We investigate the short wavelength limit of the dynamic Matsubara local field correction $\widetilde{G}(\mathbf{q},z_l)$ of the uniform electron gas based on direct \emph{ab initio} path integral Monte Carlo (PIMC) results over an unprecedented rang
Externí odkaz:
http://arxiv.org/abs/2408.04669
Publikováno v:
J. Chem. Phys. 160, 181102 (2024)
A Fourier-Matsubara series expansion is derived for imaginary-time correlation functions that constitutes the imaginary-time generalization of the infinite Matsubara series for equal-time correlation functions. The expansion is consistent with all kn
Externí odkaz:
http://arxiv.org/abs/2404.01838
Autor:
Zhang, Lei, Gull, Emanuel
Publikováno v:
Phys. Rev. B 110, 035154 (2024)
Analytical continuation is a central step in the simulation of finite-temperature field theories in which numerically obtained Matsubara data is continued to the real frequency axis for physical interpretation. Numerical analytic continuation is cons
Externí odkaz:
http://arxiv.org/abs/2312.10576
Autor:
Kawahata, Yasuko
This research aims to model tracks the evolution of opinions among agents and their collective dynamics, and mathematically represents the resonance of opinions and echo chamber effects within the filter bubble by including non-physical factors such
Externí odkaz:
http://arxiv.org/abs/2401.05266
Autor:
Diekmann, Jan, Jakobs, Severin G.
Publikováno v:
Phys. Rev. B 109, 115134 (2024)
We demonstrate how to devise a Matsubara-formalism-based one-loop approximation to the flow of the functional renormalization group (FRG) that reproduces identically the leading-logarithmic parquet approximation. This construction of a controlled fer
Externí odkaz:
http://arxiv.org/abs/2310.20648
Publikováno v:
SciPost Phys. 15.5.183 (2023)
In the field of quantum many-body physics, the spectral (or Lehmann) representation simplifies the calculation of Matsubara n-point correlation functions if the eigensystem of a Hamiltonian is known. It is expressed via a universal kernel function an
Externí odkaz:
http://arxiv.org/abs/2304.03774
Matsubara dynamics is the classical dynamics which results when imaginary-time path-integrals are smoothed; it conserves the quantum Boltzmann distribution and appears in drastically approximated form in path-integral dynamics methods such as (thermo
Externí odkaz:
http://arxiv.org/abs/2211.02042
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Autor:
Ying, Lexing
This note proposes a new algorithm for estimating spectral function from limited noisy Matsubara data. We consider both the molecule and condensed matter cases. In each case, the algorithm constructs an interpolant of the Matsubara data and uses conf
Externí odkaz:
http://arxiv.org/abs/2202.09719
Akademický článek
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