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https://github.com/pennylaneai/pennylane

PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.
https://github.com/pennylaneai/pennylane

autograd automatic-differentiation cirq deep-learning differentiable-computing hacktoberfest jax machine-learning neural-network optimization python pytorch qiskit qml quantum quantum-chemistry quantum-computing quantum-machine-learning strawberryfields tensorflow

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PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.

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  PennyLane is a cross-platform Python library for

  quantum computing,

  quantum machine learning,

  and

  quantum chemistry.






  The definitive open-source framework for quantum programming. Built by researchers, for research.

  

    

    




## Key Features






- *Program quantum computers*. Build quantum circuits with a wide range of state preparations, gates, and measurements. Run on [high-performance simulators](https://pennylane.ai/performance/) or [various hardware devices](https://pennylane.ai/plugins/), with advanced features like mid-circuit measurements and error mitigation.



- *Master quantum algorithms*. From NISQ to fault-tolerant quantum computing, unlock algorithms for research and application. Analyze performance, visualize circuits, and access tools for [quantum chemistry](https://docs.pennylane.ai/en/stable/introduction/chemistry.html) and [algorithm development](https://pennylane.ai/search/?contentType=DEMO&categories=algorithms&sort=publication_date).



- *Machine learning with quantum hardware and simulators*. Integrate with **PyTorch**, **TensorFlow**, **JAX**, **Keras**, or **NumPy** to define and train hybrid models using quantum-aware optimizers and hardware-compatible gradients for advanced research tasks. [Quantum machine learning quickstart](https://docs.pennylane.ai/en/stable/introduction/interfaces.html).



- *Quantum datasets*. Access high-quality, pre-simulated datasets to decrease time-to-research and accelerate algorithm development. [Browse the datasets](https://pennylane.ai/datasets/) or contribute your own data.



- *Compilation and performance*. Experimental support for just-in-time

  compilation. Compile your entire hybrid workflow, with support for 

  advanced features such as adaptive circuits, real-time measurement 

  feedback, and unbounded loops. See

  [Catalyst](https://github.com/pennylaneai/catalyst) for more details.



For more details and additional features, please see the [PennyLane website](https://pennylane.ai/features/).



## Installation



PennyLane requires Python version 3.10 and above. Installation of PennyLane, as well as all

dependencies, can be done using pip:



```console

python -m pip install pennylane

```



## Docker support



Docker images are found on the [PennyLane Docker Hub page](https://hub.docker.com/u/pennylaneai), where there is also a detailed description about PennyLane Docker support. [See description here](https://docs.pennylane.ai/projects/lightning/en/stable/dev/docker.html) for more information.



## Getting started



Get up and running quickly with PennyLane by following our [quickstart guide](https://docs.pennylane.ai/en/stable/introduction/pennylane.html), designed to introduce key features and help you start building quantum circuits right away.



Whether you're exploring quantum machine learning (QML), quantum computing, or quantum chemistry, PennyLane offers a wide range of tools and resources to support your research:






### Key Resources:



* [Research-oriented Demos](https://pennylane.ai/qml/demonstrations.html)

* [Learn Quantum Programming](https://pennylane.ai/qml/) with the [Codebook](https://pennylane.ai/codebook/) and [Coding Challenges](https://pennylane.ai/challenges/)

* [Frequently Asked Questions](https://pennylane.ai/faq.html)

* [Glossary](https://pennylane.ai/qml/glossary.html)

* [Videos](https://pennylane.ai/qml/videos.html)



You can also check out our [documentation](https://pennylane.readthedocs.io) for [quickstart

guides](https://pennylane.readthedocs.io/en/stable/introduction/pennylane.html) to using PennyLane,

and detailed developer guides on [how to write your

own](https://pennylane.readthedocs.io/en/stable/development/plugins.html) PennyLane-compatible

quantum device.



## Demos



Take a deeper dive into quantum computing by exploring cutting-edge algorithms using PennyLane and quantum hardware. [Explore PennyLane demos](https://pennylane.ai/qml/demonstrations.html).





  




If you would like to contribute your own demo, see our [demo submission

guide](https://pennylane.ai/qml/demos_submission).



## Research Applications



PennyLane is at the forefront of research in quantum computing, quantum machine learning, and quantum chemistry. Explore how PennyLane is used for research in the following publications:



- **Quantum Computing**: [Fast quantum circuit cutting with randomized measurements](https://quantum-journal.org/papers/q-2023-03-02-934/)



- **Quantum Machine Learning**: [Better than classical? The subtle art of benchmarking quantum machine learning models](https://arxiv.org/abs/2403.07059)



- **Quantum Chemistry**: [Accelerating Quantum Computations of Chemistry Through Regularized Compressed Double Factorization](https://quantum-journal.org/papers/q-2024-06-13-1371/)



Impactful research drives PennyLane. Let us know what features you need for your research on [GitHub](https://github.com/PennyLaneAI/pennylane/issues/new?assignees=&labels=enhancement+%3Asparkles%3A&projects=&template=feature_request.yml) or on our [website](https://pennylane.ai/research).



## Contributing to PennyLane



We welcome contributions—simply fork the PennyLane repository, and then make a [pull

request](https://help.github.com/articles/about-pull-requests/) containing your contribution. All

contributors to PennyLane will be listed as authors on the releases. All users who contribute

significantly to the code (new plugins, new functionality, etc.) will be listed on the PennyLane

arXiv paper.



We also encourage bug reports, suggestions for new features and enhancements, and even links to cool

projects or applications built on PennyLane.



See our [contributions

page](https://github.com/PennyLaneAI/pennylane/blob/master/.github/CONTRIBUTING.md) and our

[Development guide](https://pennylane.readthedocs.io/en/stable/development/guide.html) for more

details.



## Support



- **Source Code:** https://github.com/PennyLaneAI/pennylane

- **Issue Tracker:** https://github.com/PennyLaneAI/pennylane/issues



If you are having issues, please let us know by posting the issue on our GitHub issue tracker.



Join the [PennyLane Discussion Forum](https://discuss.pennylane.ai/) to connect with the quantum community, get support, and engage directly with our team. It’s the perfect place to share ideas, ask questions, and collaborate with fellow researchers and developers!



Note that we are committed to providing a friendly, safe, and welcoming environment for all.

Please read and respect the [Code of Conduct](.github/CODE_OF_CONDUCT.md).



## Authors



PennyLane is the work of [many contributors](https://github.com/PennyLaneAI/pennylane/graphs/contributors).



If you are doing research using PennyLane, please cite [our paper](https://arxiv.org/abs/1811.04968):



> Ville Bergholm et al. *PennyLane: Automatic differentiation of hybrid quantum-classical

> computations.* 2018. arXiv:1811.04968



## License



PennyLane is **free** and **open source**, released under the Apache License, Version 2.0.