Package: qmix
QMixQuantum Mixing softwareQMix is used to simulate the quasiparticle tunneling currents in Superconductor/Insulator/Superconductor (SIS) junctions. In radio astronomy, these junctions are used for heterodyne mixing at millimeter and submillimeter wavelengths. QMix can be used to simulate the behavior of SIS mixers, optimize their performance and investigate experimental results.In order to calculate the quasiparticle tunneling currents, QMix usesmulti-tone spectral domain analysis(seereferences). Among other applications, this makes QMix ideal for simulating power saturation, higher-order harmonics, sub-harmonic pumping, harmonic mixing and frequency multiplication.Website:https://garrettj403.github.io/QMix/Getting StartedThe easiest way to install QMix is usingpip:# for latest release
python -m pip install QMix

# for latest commit
python -m pip install git+https://github.com/garrettj403/QMix.gitTake a look at theQMix websitefor more information on how to use the QMix package and examples showing how to simulate SIS junctions. If you run into any problems, please create a new issue through theissue trackerwith thehelp wantedorquestiontag. In your message, make sure to include your operating system, Python version, and package versions for QMix, Numpy, SciPy and Matplotlib.Contributing to QMixIf you would like to contribute to the QMix project, please take a look at thecontribution instructions. This document includes information on reporting bugs, requesting new features, creating pull requests and contributing new code.To get a local copy of QMix running:# Download QMix
git clone https://github.com/garrettj403/QMix.git QMix
cd QMix/

# Create a virtual environment using Anaconda
conda env create -f environment.yml
conda activate qmix

# Install QMix
python -m pip install -e .

# Test installation
pytest --verbose --color=yes tests/ExamplesQMix can be used to simulate a wide variety of SIS junction behavior. A simple example is shown below for simulating an SIS mixer at 230 GHz. You can find more examples in theQMix/notebooks/directory or on theQMix website.Citing QMixIf you use QMix, please cite the following papers:@article{Qmix1,
  author       = {J. D. Garrett and G. Yassin},
  title        = {{QMix: A Python package for simulating the quasiparticle tunneling currents in SIS junctions}},
  publisher    = {Journal of Open Source Software},
  month        = mar,
  year         = 2019,
  volume       = 4,
  number       = 35,
  pages        = 1231,
  doi          = {10.21105/joss.01231},
  url          = {https://doi.org/10.21105/joss.01231},
}@article{Qmix2,
  author       = {J. D. Garrett and B.-K. Tan and F. Boussaha and C. Chaumont and G. Yassin},
  title        = {{Simulating the Behavior of a 230-GHz SIS Mixer Using Multitone Spectral Domain Analysis}},
  publisher    = {IEEE Transactions on Terahertz Science and Technology},
  month        = nov,
  year         = 2019,
  volume       = 9,
  number       = 6,
  pages        = {540--548},
  doi          = {10.1109/TTHZ.2019.2938993},
  url          = {https://ieeexplore.ieee.org/document/8822760/},
}You can also cite a specific version of QMix by citing the appropriate Zenodo archive:@article{Qmix3,
  author       = {J. D. Garrett and G. Yassin},
  title        = {{garrettj403/QMix  (Version v1.0.4)}},
  month        = apr,
  year         = 2019,
  publisher    = {Zenodo},
  doi          = {10.5281/zenodo.2640907},
  url          = {http://doi.org/10.5281/zenodo.2640907}
}LicenseQMix is released under aGNU General Public License, Version 3.