The C3 package is intended to close the loop between open-loop control optimization, control pulse calibration, and model-matching based on calibration data.

pip install c3-toolset

If you want to try out the bleeding edge (possibly buggy) version under development:

pip install c3-toolset-nightly

There is no official support for c3-toolset on Apple Silicon devices, but you can check the CONTRIBUTING.md for instructions on setting up an experimental version.

C3 provides a simple Python API through which it may integrate with virtually any experimental setup. Contact us at c3@q-optimize.org.

The paper introducing C3 as a scientific concept can be found in Wittler2021. Software and implementation details are described in SahaRoy2022.

Documentation is available here on RTD.

The following notebooks are available in the examples/ directory and can also be run online using the launch|binder badge above:

• Model-based Optimal Control for Single Qubit Gate
• Model-based Optimal Control for Two Qubit Engtangling Gate
• Model-free Calibration on Simulated Hardware
• Simulated Model Learning with data from Simulated Calibration
• Full loop - Control, Calibration & Characterization
• Minimum example for using the Qiskit interface
• Minimum example for optimizing piece-wise constant pulses
• Understanding the ParameterMap
• Frequency Dependent Coupling

If you wish to contribute, please check out the issues tab and also the CONTRIBUTING.md for useful resources.

The source code is available on Github at https://github.com/q-optimize/c3.

If you use c3-toolset in your research, please cite it as below:

@article{Wittler2021,
   title={Integrated Tool Set for Control, Calibration, and Characterization of Quantum Devices Applied to Superconducting Qubits},
   volume={15},
   DOI={10.1103/physrevapplied.15.034080},
   number={3},
   journal={Physical Review Applied},
   author={Wittler, Nicolas and Roy, Federico and Pack, Kevin and Werninghaus, Max and Saha Roy, Anurag and Egger, Daniel J. and Filipp, Stefan and Wilhelm, Frank K. and Machnes, Shai},
   year={2021},
   month={Mar}
}