A Reservoir Computing Approach to Quantum State Measurement

Quantum state measurement is an essential step in the probe or operation of any quantum system, and its optimization has accordingly been the focus of considerable ongoing research. Increases in the speed and fidelity of continuous measurements directly contribute to quantum information processing applications and the fundamental study of quantum systems. In this work, we propose a hardware-based reservoir computing system for quantum state measurement and discuss its performance when compared to conventional approaches. We theoretically analyze the readout of a superconducting circuit via direct coupling to a minimal reservoir computer and demonstrate how such a system provides a low latency approach to state measurement.