# Experimental Low-Latency Device-Independent Quantum Randomness

## TL;DR

This paper demonstrates a highly efficient, low-latency device-independent quantum randomness generator using a loophole-free Bell test, producing certified random bits in under 5 minutes per block.

## Contribution

It introduces a more efficient quantum-proof protocol that significantly reduces the latency of device-independent quantum randomness generation.

## Key findings

- Multiple 512-bit blocks generated in less than 5 minutes each
- Certified error bound of approximately 5.42×10^{-20}
- Loophole-free Bell test implementation successfully used

## Abstract

Applications of randomness such as private key generation and public randomness beacons require small blocks of certified random bits on demand. Device-independent quantum random number generators can produce such random bits, but existing quantum-proof protocols and loophole-free implementations suffer from high latency, requiring many hours to produce any random bits. We demonstrate device-independent quantum randomness generation from a loophole-free Bell test with a more efficient quantum-proof protocol, obtaining multiple blocks of $512$ bits with an average experiment time of less than $5$ min per block and with a certified error bounded by $2^{-64}\approx 5.42\times 10^{-20}$.