Research and contribution


If you are doing research using The Walrus, please cite our paper:

Brajesh Gupt, Josh Izaac and Nicolás Quesada. The Walrus: a library for the calculation of hafnians, Hermite polynomials and Gaussian boson sampling. Journal of Open Source Software, 4(44), 1705 (2019)

We are always open for collaboration, and can be contacted at


If you would like to get involved with The Walrus, or you would like to contribute, simply fork our Github repository, and make a descriptive pull request.


If you are having issues, please let us know, either by email or by posting the issue on our Github issue tracker.

We have a mailing list located at: