Flexible Quantum Error Correction with the QOP [QBE 2022]

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Quantum error correction (QEC) protocols are required to fulfill the great promise of fault-tolerant quantum computing. While quantum computers have the potential to solve important problems beyond the reach of any classical technology, error rates pose a great challenge towards the realization of a practical machine. QEC reduces the error rates by encoding quantum information in logical qubits and is thus considered the most promising path towards realizing the full potential of quantum computers. However, many future applications of viable quantum computing will require logical error rates on the order of 10^-15, while even the most advanced quantum processors currently achieve physical error rates in the 10^-3 regime. This gap introduces great challenges for practical QEC as the overheads in both quantum resources, as well as classical control resources, can become very large. Moreover, these overheads by themselves can introduce new error channels and other complications, making QEC even more complex.

While significant challenges remain in designing the quantum hardware necessary for QEC, equally important to address are the requirements for QEC on the classical control side. A highly flexible control platform that allows programming and executing QEC protocols from the software layer while utilizing demanding real-time processing and control flow is required to progress at the highest speed.

In this talk, we focus on the classical control in QEC and demonstrate how it is implemented on QM’s Quantum Orchestration Platform (QOP) to enhance performance and optimize results. We show how the technology behind the platform allows for a fast and flexible design and exploration of QEC protocols while providing unmatched performance. In particular, we will discuss novel adaptive error syndrome measurements as well as repeat until success protocols introduced in recent works. We will also introduce new protocols we recently developed, and demonstrate their implementation on the QOP.