SPAD-Based Quantum Random Number Generator With an N-Order Rank Algorithm on FPGA.

We present a compact, all-solid-state, low-cost quantum random number generator (QRNG) based on a single-photon avalanche diode (SPAD) and a field programmable gate array (FPGA). A new algorithm for random bit generation is described, ranking the inter-arrival times of a group of M photons detected by the SPAD device, and processed directly on the FPGA. The proposed approach improves the efficienc...