Bosonic Codes and Quantum Error Correction in Circuit QED

Speaker:
Steve Girvin, Yale Quantum Institute and Co-Design Center for Quantum Advantage Brookhaven National Laboratory
‘Circuit QED’ is non-linear quantum optics extended to cryogenic electrical circuits with superconducting qubits playing the role of artificial atoms interacting with quantized microwave fields. It represents a leading architecture for the eventual creation of large-scale fault-tolerant quantum computers. Recent remarkable theoretical and experimental progress in our ability to measure and manipulate the quantum states of individual microwave photons is leading to novel applications in quantum information processing. Experimental realizations of various ‘bosonic codes’ (cat, binomial and GKP) have successfully approached and even (slightly) exceeded the threshold where quantum error correction begins to extend the lifetime of quantum information.