High speed self-testing quantum random number generation without detection loophole

TL;DR

This paper demonstrates a high-speed, detection-loophole free quantum random number generator that self-tests its randomness in a device-independent manner, achieving 114 bits/sec even under worst-case adversarial attacks.

Contribution

It provides the first experimental implementation of a self-testing QRNG based on a loophole-free Bell test with high bit rate and robust security analysis.

Findings

Achieved 114 bits/sec random bit rate.

Implemented detection-loophole free Bell test with entangled photons.

Ensured security against the strongest adversarial attacks.

Abstract

Quantum mechanics provides means of generating genuine randomness that is impossible with deterministic classical processes. Remarkably, the unpredictability of randomness can be certified in a self-testing manner that is independent of implementation devices. Here, we present an experimental demonstration of self-testing quantum random number generation based on an detection-loophole free Bell test with entangled photons. In the randomness analysis, without the assumption of independent identical distribution, we consider the worst case scenario that the adversary launches the most powerful attacks against quantum adversary. After considering statistical fluctuations and applying an 80 Gb $\times$ 45.6 Mb Toeplitz matrix hashing, we achieve a final random bit rate of 114 bits/s, with a failure probability less than $10^{-5}$. Such self-testing random number generators mark a critical step towards realistic applications in cryptography and fundamental physics tests.