Ana_cont: Python package for analytic continuation

Abstract

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 Padé approximants or the maximum entropy method. The determination of hyperparameters and the implementation are described in detail. The code is publicly available on GitHub, where also documentation and learning resources are provided. Program summaryProgram Title: ana_contCPC Library link to program files:https://doi.org/10.17632/vphzykvvf2.1Developer's repository link:https://github.com/josefkaufmann/ana_contLicensing provisions: MITProgramming language:PythonExternal dependencies:Python(≥3.6), numpy, scipy, matplotlib, h5py, PyQt5, CythonSupplementary material: Test case files, tutorials, and instructionsNature of problem: Analytic continuation of correlation functions from Matsubara frequencies/imaginary time to real frequencies.Solution method: Padé interpolation, maximum entropy methodAdditional comments including restrictions and unusual features: The most important features can be accessed through the graphical user interface. For more flexibility, it is recommended to use the code as a library and write problem specific scripts.