PennyLane-Qrack Plugin

The PennyLane-Qrack plugin integrates the Qrack quantum computing framework with PennyLane’s quantum machine learning capabilities.

Performance can benefit greatly from following the Qrack repository “Quick Start” and “Power user considerations.”

This plugin is addapted from the PennyLane-Qulacs plugin, under the Apache License 2.0, with many thanks to the original developers!

PennyLane is a cross-platform Python library for quantum machine learning, automatic differentiation, and optimization of hybrid quantum-classical computations.

unitaryfund/qrack (formerly vm6502q/qrack) is a software library for quantum computing, written in C++ and with GPU support.

PennyLane Catalyst provides optional quantum just-in-time (QJIT) compilation, for improved performance.

Features

Provides access to a PyQrack simulator backend via the qrack.simulator device
Provides access to a (C++) Qrack simulator backend for Catalyst (also) via the qrack.simulator device
Provides access to a PyQrack near-Clifford simulator backend via the qrack.stabilizer device
Provides access to a PyQrack simulator backend optimized for large-scale approximate simulation via the qrack.ace device

Installation

This plugin requires Python version 3.9 or above, as well as PennyLane and the Qrack library.

Installation of this plugin as well as all its Python dependencies can be done using pip (or pip3, as appropriate):

$ pip3 install pennylane-qrack

This step should automatically build the latest main branch Qrack library, for Catalyst support, if Catalyst support is available.

Dependencies

PennyLane-Qrack requires the following libraries be installed:

Python >= 3.9
Qrack >= 9.0

as well as the following Python packages:

PennyLane >= 0.32
PyQrack >= 1.28.0

with optional functionality provided by the following Python packages:

Catalyst >= 0.7

If you currently do not have Python 3 installed, we recommend Anaconda for Python 3, a distributed version of Python packaged for scientific computation.

Tests

To test that the PennyLane-Qrack plugin is working correctly you can run

$ make test

in the source folder.

Contributing

We welcome contributions - simply fork the repository of this plugin, and then make a pull request containing your contribution. All contributers to this plugin will be listed as authors on the releases.

We also encourage bug reports, suggestions for new features and enhancements, and even links to cool projects or applications built on PennyLane.

Authors

PennyLane-Qrack has been directly adapted by Daniel Strano from PennyLane-Qulacs. PennyLane-Qulacs is the work of many contributors.

If you are doing research using PennyLane and PennyLane-Qulacs, please cite their paper:

Ville Bergholm, Josh Izaac, Maria Schuld, Christian Gogolin, M. Sohaib Alam, Shahnawaz Ahmed, Juan Miguel Arrazola, Carsten Blank, Alain Delgado, Soran Jahangiri, Keri McKiernan, Johannes Jakob Meyer, Zeyue Niu, Antal Száva, and Nathan Killoran. PennyLane: Automatic differentiation of hybrid quantum-classical computations. 2018. arXiv:1811.04968

Support

Source Code: https://github.com/vm6502q/pennylane-qrack
Issue Tracker: https://github.com/vm6502q/pennylane-qrack/issues
PennyLane Forum: https://discuss.pennylane.ai

If you are having issues, please let us know by posting the issue on our Github issue tracker, or by asking a question in the forum.

License

The PennyLane-Qrack plugin is free and open source, released under the Apache License, Version 2.0.

Metadata

Release files for pennylane-qrack-cpu 1.3.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for pennylane-qrack-cpu 1.3.0
File	Size	Uploaded	Provenance
pennylane_qrack_cpu-1.3.0.tar.gz	37.5 kB	Oct 20, 2026	Without provenance	Details

Built distributions (wheels)

Table of built distributions (wheels) for pennylane-qrack-cpu 1.3.0
File	Interpreter	ABI	Platform	Reset
pennylane_qrack_cpu-1.3.0-py3-none-win_amd64.whl 35.3 kB Oct 20, 2026 Without provenance	Python 3	none	Windows x86-64	Details
pennylane_qrack_cpu-1.3.0-py3-none-manylinux_2_39_x86_64.whl 1.6 MB Oct 20, 2026 Without provenance	Python 3	none	Linux glibc 2.39+ x86-64	Details
pennylane_qrack_cpu-1.3.0-py3-none-manylinux_2_35_x86_64.whl 1.6 MB Oct 20, 2026 Without provenance	Python 3	none	Linux glibc 2.35+ x86-64	Details
pennylane_qrack_cpu-1.3.0-py3-none-macosx_15_0_x86_64.whl 1.0 MB Oct 20, 2026 Without provenance	Python 3	none	macOS 15.0+ x86-64	Details
pennylane_qrack_cpu-1.3.0-py3-none-macosx_15_0_arm64.whl 969.2 kB Oct 20, 2026 Without provenance	Python 3	none	macOS 15.0+ ARM64	Details
pennylane_qrack_cpu-1.3.0-py3-none-macosx_14_0_arm64.whl 975.8 kB Oct 20, 2026 Without provenance	Python 3	none	macOS 14.0+ ARM64	Details

Total release size: 6.2 MB

Release files / pennylane_qrack_cpu-1.3.0.tar.gz

Download URL	pennylane_qrack_cpu-1.3.0.tar.gz
Size	37.5 kB
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Release files / pennylane_qrack_cpu-1.3.0-py3-none-win_amd64.whl

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Upload date	Oct 20, 2026
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Uploaded via	`twine/7.0.0 CPython/3.14.4`

Release files / pennylane_qrack_cpu-1.3.0-py3-none-manylinux_2_39_x86_64.whl

Download URL	pennylane_qrack_cpu-1.3.0-py3-none-manylinux_2_39_x86_64.whl
Size	1.6 MB
Tags	Linux glibc 2.39+ x86-64 Python 3
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Uploaded via	`twine/7.0.0 CPython/3.14.4`

Release files / pennylane_qrack_cpu-1.3.0-py3-none-manylinux_2_35_x86_64.whl

Download URL	pennylane_qrack_cpu-1.3.0-py3-none-manylinux_2_35_x86_64.whl
Size	1.6 MB
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Upload date	Oct 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.14.4`

Release files / pennylane_qrack_cpu-1.3.0-py3-none-macosx_15_0_x86_64.whl

Download URL	pennylane_qrack_cpu-1.3.0-py3-none-macosx_15_0_x86_64.whl
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Upload date	Oct 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.14.4`

Release files / pennylane_qrack_cpu-1.3.0-py3-none-macosx_15_0_arm64.whl

Download URL	pennylane_qrack_cpu-1.3.0-py3-none-macosx_15_0_arm64.whl
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Upload date	Oct 20, 2026
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Uploaded via	`twine/7.0.0 CPython/3.14.4`

Release files / pennylane_qrack_cpu-1.3.0-py3-none-macosx_14_0_arm64.whl

Download URL	pennylane_qrack_cpu-1.3.0-py3-none-macosx_14_0_arm64.whl
Size	975.8 kB
Tags	Python 3 macOS 14.0+ ARM64
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Upload date	Oct 20, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.14.4`

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