502 Gbits/s Quantum Random Number Generation with Simple and Compact Structure

TL;DR

This paper presents a simple, compact quantum random number generator based on laser phase fluctuations, achieving a record 502 Gbps rate, significantly surpassing previous schemes and enhancing practical applications.

Contribution

It introduces a novel QRNG scheme using laser phase fluctuations that is simple, compact, and achieves unprecedented high-speed random bit generation.

Findings

Achieved 502 Gbps random bit generation rate.

The experimental data matches the theoretical model.

The scheme is simpler and faster than previous QRNG methods.

Abstract

We propose and implement a simple and compact quantum random number generation (QRNG) scheme based on the quantum phase fluctuations of a DFB laser. The distribution probability of the experimentally measured data fits well with the simulation result, got from the theoretical model we established. Min-entropy estimation and Toeplitz-hashing randomness extractor are used to obtain the final random bit. The proposed approach has advantages not only in simple structure but also in high random bit generation rate. As a result, 502 Gbits/s random bits generation speed can be obtained, which is much higher than previous similar schemes. This approach offers a possibility to promote the practical application of QRNG.