Source-device-independent Ultra-fast Quantum Random Number Generation

TL;DR

This paper introduces a device-independent method for ultra-fast quantum random number generation that guarantees security against classical and quantum side information, achieving over 1 Gbit/s in experiments.

Contribution

It presents a novel approach to generate secure random numbers without assumptions on the input state, using entropic uncertainty principles for high-speed quantum randomness.

Findings

Generated secure random bits at >1 Gbit/s rate

Eliminated predictability due to classical and quantum side information

Provided a practical experimental demonstration of the method

Abstract

Secure random numbers are a fundamental element of many applications in science, statistics, cryptography and more in general in security protocols. We present a method that enables the generation of high-speed unpredictable random numbers from the quadratures of an electromag- netic field without any assumption on the input state. The method allows to eliminate the numbers that can be predict due the presence of classical and quantum side information. In particular, we introduce a procedure to estimate a bound on the conditional min-entropy based on the Entropic Uncertainty Principle for position and momentum observables of infinite dimensional quantum sys- tems. By the above method, we experimentally demonstrated the generation of secure true random bits at a rate greater than 1 Gbit/s.