Challenging Qblox electronics to improve quantum error correction with superconducting processors

Feedback control

Real-time, all-to-all data sharing between control modules in a Qblox Cluster, enabled by the new LINQ protocol, will be used to demonstrably improve the logical error rates in repetition and surface QEC codes. This feedback control will condition gates on the outcome of measurement operations in such a way as to reduce the impact of physical-qubit energy relaxation at the logical-qubit level.

Real-time gate calling and circuit parametrization

The expanded instruction set of Q1 sequencer cores allows changing quantum circuits (gates, measurements and parameters thereof) at run time. This capability will be used to controllably inject stochastic errors into these QEC codes, enabling the experimental study of their sensitivity and resilience to specific types of noise. This capability will also be used to characterize qubit parameters across QEC processors using real-time bayesian estimation. Both use cases will target order-of-magnitude speedup compared to traditional methods relying on pre-compiled circuits.