Experimental Low-Latency Device-Independent Quantum Randomness

TitleExperimental Low-Latency Device-Independent Quantum Randomness
Publication TypeJournal Article
Year of Publication2020
AuthorsZhang, Y, Shalm, LK, Bienfang, JC, Stevens, MJ, Mazurek, MD, Nam, SWoo, Abellán, C, Amaya, W, Mitchell, MW, Fu, H, Miller, C, Mink, A, Knill, E
JournalPhys. Rev. Lett.
Date Published12/24/2019

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 certified error bounded by 2−64≈5.42×10−20.