Quantum noise extraction from the interference of laser pulses in optical quantum random number generator

TL;DR

This paper introduces a novel method for extracting quantum noise from laser pulse interference using a new quantum reduction factor, enabling high-speed, post-processing-free optical quantum random number generation at 2 Gbps.

Contribution

The paper presents the first use of the quantum reduction factor to distinguish quantum noise, facilitating a high-rate, post-processing-free optical quantum random number generator.

Findings

Quantum reduction factor effectively separates quantum and classical noise.

Achieved 2 Gbps random bit generation rate.

First implementation of a post-processing-free optical QRNG.

Abstract

We propose a method for quantum noise extraction from the interference of laser pulses with random phase. Our technique is based on the calculation of a parameter, which we called the quantum reduction factor, and which allows determining the contributions of quantum and classical noises in the assumption that classical fluctuations exhibit Gaussian distribution. To the best of our knowledge, the concept of the quantum reduction factor is introduced for the first time. We use such an approach to implement the post-processing-free optical quantum random number generator with the random bit generation rate of 2 Gbps.