Saif Al-Kuwari

Quantum random number generation leverages the inherent randomness of quantum systems to produce fundamentally nondeterministic outputs. We experimentally demonstrate a compact QRNG using single photons emitted by a quantum dot and coupled into an optical nanofiber’s guided mode. The randomness originates from single photons randomly occupying one of two fiber output paths, and we assign a single qubit state for the path basis. The generated sequence passes the NIST randomness test suite, achieving a 1.8 Mbps generation rate with high single-photon purity of g2(0)= 0.07±0.04. This alignment-free nanofiber platform offers a scalable, efficient photonic QRNG solution, suitable for quantum cryptography and secure key distribution.