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Condensed Matter > Strongly Correlated Electrons
Title: Fourier-Matsubara series expansion for imaginary-time correlation functions
(Submitted on 2 Apr 2024 (v1), last revised 19 Apr 2024 (this version, v2))
Abstract: 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 known exact properties of imaginary-time correlation functions and opens up new avenues for the utilization of quantum Monte Carlo simulation data. Moreover, the expansion drastically simplifies the computation of imaginary-time density-density correlation functions with the finite temperature version of the self-consistent dielectric formalism. Its existence underscores the utility of imaginary-time as a complementary domain for many-body physics.
Submission history
From: Panagiotis Tolias [view email][v1] Tue, 2 Apr 2024 10:54:43 GMT (36kb)
[v2] Fri, 19 Apr 2024 13:22:42 GMT (36kb)
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