Certified Randomness Expansion using a Loophole‐Free Bell Test
16:40 - 17:00
Lynden Shalm, Yanbao Zhang, Mohammad Alhejji, Michael Mazurek, Martin Stevens, Carlos Abellán, Morgan Mitchell, Sae Woo Nam and Emanuel Knill I will discuss our recent work using a photonic-based Bell experiment to perform the first device-independent randomness expansion. Our experiment is able to produce more certified random output bits than input bits consumed. These expansion protocols have more demanding requirements compared to regular device-independent randomness generation, and several theoretical and experimental innovations were required in order to realize randomness expansion. After taking 130 hours of data, we have achieved certified randomness expansion. Our work opens the way for other novel device-independent protocols, and has the potential for use in quantum networked applications.
