ana_cont: Python package for analytic continuation
Update: Documentation and resources can be found on https://josefkaufmann.github.io/ana_cont/.
Any questions, suggestions and bug reports will be received gratefully. (Mail to: josefkaufma at gmail dot com)
where some implementation details are described in the Supplementary Material.
Analytic continuation of Matsubara Green's functions is a difficult task, for which there exists a large variety of methods and codes. This package does, for now, not contain any new method, but its concept differs from most other codes: I do not provide compiled program that is able to do many different tasks, but instead a small Python library containing the necessary classes and functions. Based on this, the user is encouraged to write their own scripts, fitting their needs.
Currently, the Pade approximation and the Maximum Entropy method are implemented.
- ana_cont contains the main code files.
- gui contains the code for the graphical user interface.
- doc contains some learning resources.
- scripts contains some simple examples how the library may be used; also the GUI executables are located there.
The code was checked to run with the following versions: * python3-dev * Python 3.7 * numpy 1.18.1 * scipy 1.4.1 * Cython 0.29.15 (only for Pade) * matplotlib 3.1.3 * h5py 2.10.0 * PyQt5 (only for GUI)
It is likely that the code runs also with older package versions, but I cannot guarantee for that.
Installation and usage
Installation via pip
The ana_cont library can be installed via pip:
sudo apt install python3-dev
python3 -m pip install -U pyqt5 matplotlib wheel cython h5py scipy
pip install -i https://test.pypi.org/simple/ ana-cont
This installs the
ana_cont python library.
The GUI scripts are also installed and
can be called from the command line as
Installation from source via git
I recommend the following steps:
git clone https://github.com/josefkaufmann/ana_cont
If you want to use Pade, you have to compile:
python setup.py build_ext --inplace
Now you can add the code directory to the python path in your script and import the package:
import ana_cont.continuation as cont
The graphical user interface scripts can be executed as
Running tests after installation from source
python3 -m unittest tests/ana_cont_tests.py -v