QASAR (Quantum Architectures, Small And Reliable) is an Inria associate team between Inria in Nancy and UCL in London. It started in 2022, the list of participating members can be found here, our activities here and you can also contact us.


Quantum computation promises to speed–up certain problems of interest that would be infeasible to solve using today’s (classical) computing paradigms. Although much progress towards the implementation of quantum computers has been made in the past 10 years, there remain formidable challenges such as coping with the noise inevitably present in quantum devices. While in principle we now know how to correct errors in quantum devices, it has been shown that the amount of resource overhead is still forbiddingly high. This poses a significant obstacle for the viability of quantum computing in the near- and mid-term. The objective for the associated team is to establish strong foundations for fault-tolerant quantum computation in realistic and practical settings. For this, a systematic understanding of the fault-tolerant computation capabilities of small quantum codes is required. This includes small block codes using qubits as well as small codes leveraging hardware control for error correction like bosonic codes. These kind of small setups are the most mature today. In the near future it will be possible to link them in a modular way and that is why anticipating distributed architecture is also a priority.

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