Device-Independent Randomness Generation in the Presence of Weak Cross-Talk

Abstract

Device-independent protocols use nonlocality to certify that they are performing properly. This is achieved via Bell experiments on entangled quantum systems, which are kept isolated from one another during the measurements. However, with present-day technology, perfect isolation comes at the price of experimental complexity and extremely low data rates. Here we argue that for device-independent randomness generation -- and other device-independent protocols where the devices are in the same lab -- we can slightly relax the requirement of perfect isolation, and still retain most of the advantages of the device-independent approach, by allowing a little cross-talk between the devices. This opens up the possibility of using existent experimental systems with high data rates, such as Josephson phase qubits on the same chip, thereby bringing device-independent randomness generation much closer to practical application.

arXiv comment6 pages, 2 figures

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Cited by in corpus (17)

• Bell nonlocality
• Certified randomness in quantum physics
• Semi-device-independent framework based on natural physical assumptions
• Using complete measurement statistics for optimal device-independent randomness evaluation
• Device-independent demonstration of genuine multipartite entanglement
• Semidefinite programming relaxations for quantum correlations
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• Device-independent quantum key distribution from computational assumptions
• Interactive proofs with approximately commuting provers