Practical Semi-Device Independent Randomness Generation Based on Quantum State's Indistinguishability

Understand

Semi-device independent (Semi-DI) quantum random number generators (QRNG) gained attention for security applications, offering an excellent trade-off between security and generation rate.

• This paper presents a proof-of-principle time-bin encoding semi-DI QRNG experiments based on a prepare-and-measure scheme.
• The protocol requires two simple assumptions and a measurable condition: an upper-bound on the prepared pulses' energy.
• We lower-bound the conditional min-entropy from the energy-bound and the input-output correlation, determining the amount of genuine randomness that can be certified.