Release Qu&Co open-source quantum-code-chemistry

31 July 2019

Amsterdam, 31 Juli 2019 - Today Qu & Co, a quantum-computing software developer, announces the release of its first open-source Qu & Co quantum-code.

Qu & Co quantum-codes are a collection of open-source quantum-algorithm libraries, which can be run either on a quantum-simulator or a quantum-processor. Our quantum-codes provide some insight in how we translate academic research in the field of quantum-information into practical applications. Qu & Co quantum-codes are also an invitation to the quantum-community to share knowledge and work together on advancing the development and adoption of industry-relevant quantum-applications.

Qu & Co quantum-codes are open-source and offer only a small insight into the range of algorithms we develop for our corporate clients. If you are interested to learn more about our solutions for chemistry, material-science, life-sciences or quantum-AI, please contact us at This email address is being protected from spambots. You need JavaScript enabled to view it..

Qu & Co quantum-code-chemistry is an end-to-end stack, which compiles and executes quantum-chemistry algorithms for current-day (small and noisy) quantum-processors. The package is highly customizable and can be executed on a wide range of simulation backend types, in addition to being able to run on Rigetti Computing’s QPU. Users may configure their own quantum-circuits, or use built-in functionality, which allows the user to turn the outcome from various classical computational-chemistry packages into the starting point for creating their own problem-specific quantum-algorithm. For more information please visit https://github.com/qu-co/qucochemistry 

Qu & Co quantum-code-chemistry implements the so-called Variational Quantum Eigensolver (VQE), which is a quantum-computing algorithm well suited for working with the limitations of current-day small and noisy quantum-processors, because it shortens the necessary quantum-circuits by applying a quantum-classical hybrid optimization scheme. Our quantum-code-chemistry is highly flexible, allowing the user to implement quantum-circuits of their own design or use the built-in unitary coupled-cluster with singles and doubles (UCCSD) method as an Ansatz.

The release of Qu & Co quantum-code-chemistry also marks our first contribution as a QCS Development Partner of quantum-hardware developer Rigetti Computing. QCS serves as a single access point to Rigetti's quantum-processors and quantum-simulators. As a QCS Development Partner, Qu & Co uses the QCS platform for developing quantum-applications and to distribute them to our clients and to the broader QCS community.

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