Experimental device-independent certified randomness generation with an instrumental causal structure

Author / Creator

Quantum 2020 (2020)

Conferences

Quantum 2020 P3: Quantum foundations (2020)

Available as

Online

Summary

The intrinsic random nature of quantum physics offers novel tools for the generation of random numbers. However, verifying that a device is actually exploiting quantum effects to generate randomnes...

The intrinsic random nature of quantum physics offers novel tools for the generation of random numbers. However, verifying that a device is actually exploiting quantum effects to generate randomness is an elusive task. In this work, we adopt a device-independent approach, i.e. without assumptions on the measurement and state-generation, to generate certified randomness, exploiting a particular class of processes, called instrumental scenario. First, we theoretically show that certified random bits, private against general quantum adversaries, can be extracted exploiting quantum instrumental-inequality violations. Then, we experimentally implement the corresponding randomness-generation protocol using entangled photons and active feed-forward of information.

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