A self-testing quantum random number generator

TL;DR

This paper introduces a practical, self-testing quantum random number generator protocol that ensures real-time monitoring of entropy without detailed device characterization, demonstrated with an optical setup.

Contribution

The paper presents a novel self-testing protocol for quantum randomness generation that guarantees high-quality randomness in real-time without detailed device calibration.

Findings

Successful implementation of the protocol with an optical setup

Real-time entropy monitoring demonstrated

High-quality randomness generated continuously

Abstract

The generation of random numbers is a task of paramount importance in modern science. A central problem for both classical and quantum randomness generation is to estimate the entropy of the data generated by a given device. Here we present a protocol for self-testing quantum random number generation, in which the user can monitor the entropy in real-time. Based on a few general assumptions, our protocol guarantees continuous generation of high quality randomness, without the need for a detailed characterization of the devices. Using a fully optical setup, we implement our protocol and illustrate its self-testing capacity. Our work thus provides a practical approach to quantum randomness generation in a scenario of trusted but error-prone devices.