Qubit energy levels and fluorescence detection used for single-ion readout.

The study implements neural-network readout on FPGA and ARM hardware, achieving an average single-qubit readout fidelity of 99.5% within 171 μs. Convolutional and fully connected neural networks process the ion’s fluorescence signal, while local hardware processing reduces communication delays and supports real-time readout and feedback.

Paper link: Physical Review Applied 12, 014038 (2019)