# The Walrus

**Canonical:** https://apis.io/apis/xanadu/thewalrus/  
**Provider:** Xanadu — https://apis.io/providers/xanadu/  
**Documentation:** https://the-walrus.readthedocs.io/

The Walrus is one of 10 APIs that [Xanadu](https://apis.io/providers/xanadu/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Quantum Computing, Photonic, Gaussian Boson Sampling, Hafnian, and Open-Source. The published artifact set on APIs.io includes API documentation and a GitHub repository.

The Walrus is a Python/C++ library for the fast calculation of hafnians, loop hafnians, and multidimensional Hermite polynomials — the linear-algebra primitives behind Gaussian boson sampling and photonic quantum state characterization. Apache-2.0; published in the Journal of Open Source Software (2019).

## Machine-readable artifacts (3)

- **Documentation** — https://the-walrus.readthedocs.io/
- **GitHubRepository** — https://github.com/XanaduAI/thewalrus
- **SDKs** — https://pypi.org/project/thewalrus/

## Other Xanadu APIs (9)

- [PennyLane](https://apis.io/apis/xanadu/pennylane/)
- [Catalyst](https://apis.io/apis/xanadu/catalyst/)
- [PennyLane Lightning](https://apis.io/apis/xanadu/pennylane-lightning/)
- [Strawberry Fields](https://apis.io/apis/xanadu/strawberry-fields/)
- [MrMustard](https://apis.io/apis/xanadu/mrmustard/)
- [Blackbird](https://apis.io/apis/xanadu/blackbird/)
- [PennyLane-Qiskit Plugin](https://apis.io/apis/xanadu/pennylane-qiskit/)
- [FlamingPy](https://apis.io/apis/xanadu/flamingpy/)
- [Xanadu Cloud Client](https://apis.io/apis/xanadu/xanadu-cloud-client/)

## Tags

Quantum Computing, Photonic, Gaussian Boson Sampling, Hafnian, Open-Source

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/xanadu/thewalrus/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/xanadu/.