Low-latency systems in quantum computing are control architectures designed to minimize the time between a measurement event and a conditional response, enabling real-time feedback, error correction, and adaptive protocols.
Why it matters. Latency is a system-level property that depends on every component in the feedback loop: the time to perform a measurement, digitize the result, process it (e.g., state discrimination or syndrome decoding), make a decision, and deliver the conditional pulse. For superconducting qubits with gate times of tens of nanoseconds, the entire feedback loop must complete in hundreds of nanoseconds. Any delay beyond this window means errors accumulate faster than they can be corrected. Low-latency architecture is not just about fast individual components but about how data flows through the system, which is why integrated architectures with on-board processing and dedicated feedback networks outperform systems that route data through external computers.
How it connects. Low latency is a core design principle of the Qblox Cluster. The LINQ protocol delivers deterministic, all-to-all feedback with a cluster-wide feedback loop under 650 nanoseconds, with on-board state discrimination in the readout modules eliminating the need to send raw data to an external processor for thresholding. Learn more about the Cluster.
