Quantum Seminar: Quantum Error Correction Beyond Break Even Using Microwave Photons
Prof. Steven M. Girvin - Department of Physics, Yale University
Hybrid platforms comprised of superconducting qubits and microwave oscillators (bosonic modes) offer powerful architectures with novel gates and instruction sets for quantum computation, quantum simulation, and hardware-efficient quantum error correction. Several different experiments using ‘bosonic codes’ have now exceeded the break-even point for the first time in any technology. I will describe a recent experiment from the Devoret group using the GKP bosonic code, that achieved a record quantum error correction gain through a combination of improved qubit coherence times, a new protocol to semi-autonomously ‘cool’ the oscillator into the code space removing the entropy associated with errors, and a novel machine learning agent that optimized 45 parameters in the experiment.