6 Gbps real-time optical quantum random number generator based on vacuum fluctuation

TL;DR

This paper presents a high-speed, real-time optical quantum random number generator achieving 6 Gbps, utilizing vacuum fluctuation measurement and an optimized Toeplitz hashing algorithm for efficient randomness extraction.

Contribution

The work introduces a novel high-speed quantum random number generator with an optimized parallel extraction algorithm supporting up to hundreds of Gbps.

Findings

Achieved 6 Gbps real-time quantum randomness generation.

Real-time extraction rate reached 12 Gbps with optimized algorithm.

Supports generation of 6 Gbps provably random numbers in real-time.

Abstract

We demonstrate a 6 Gbps real-time optical quantum random number generator by measuring vacuum fluctuation. To address the common problem that speed gap exists between fast randomness generation and slow randomness extraction in most high-speed real-time quantum random number generator systems, we present an optimized extraction algorithm based on parallel implementation of Toeplitz hashing to reduce the influence of classical noise due to the imperfection of devices. Notably, the real-time rate of randomness extraction we have achieved reaches the highest speed of 12 Gbps by occupying less computing resources and the algorithm has the ability to support hundreds of Gbps randomness extraction. By assuming that the eavesdropper with complete knowledge of the classical noise, our generator has a randomness generation speed of 6.83 Gbps and this supports the generation of 6 Gbps information-theoretically provable quantum random numbers, which are output in real-time through peripheral component interconnect express interface.