The Unitary library's API intends to provide common operations that enable a programmer to add behavior to their game mechanic, or game objects, based on the core principles of Quantum Information Science (QIS): Superposition, Entanglement, Interference, and Measurement.

While the library can be used for other purposes, the Unitary library is designed for game developers. The library is an extension of Google's Cirq library, which enables people to specify circuits for quantum computing.

This repository also contains several reference applications, such as Quantum Chess, which can be found in the quantum_chess directory.

Unitary uses Python 3.12. It's recommended to use a virtual environment for installing Unitary to avoid interfering with other system packages:

python3.12 -v venv ~/unitary
source ~/unitary/bin/activate

Unitary can then be installed within that virtual environment.

Unitary is not available as a PyPI package. Please clone this repository and install from source:

cd unitary/
pip install .

Documentation is available at https://quantumai.google/cirq/experiments.

Note: before committing, you will need to sign a Contributor License Agreement (CLA).

Please fork the repository (for instance, by using the button in the upper right corner).

You can then clone the repository into your development environment by using (substitute USER with your github username)

git clone https://github.com/USER/unitary.git
cd unitary
git remote add upstream https://github.com/quantumlib/unitary.git

This will clone your fork so that you can work on it, while marking the name 'upstream' as the original repository.

You can then pull from the original and update your fork, for instance, by doing this:

git pull upstream main
git push origin main

In order to push changes to unitary, create a branch in your fork:

git checkout -b BRANCH_NAME

Perform your changes, then commit (i.e. git commit -a) then push to your fork:

git push origin BRANCH_NAME

This will give you a link to create a PR (pull request). Create this pull request and pick some reviewers. Once approved, it will be merged into the original repository.

Thanks for contributing!

This code leverages Cirq as a quantum programming language and SDK.

Unitary is not an official Google product. Copyright 2022 Google.