We report on an optical setup generating more than one bit of randomness from one entangled bit (i.e. a maximally entangled state of two-qubits). The amount of randomness is certified through the observation of Bell non-local correlations. To attain this result we implemented a high-purity entanglement source and a non-projective three-outcome measurement. Our implementation achieves a gain of 27% of randomness as compared with the standard methods using projective measurements. Additionally we estimate the amount of randomness certified in a one-sided device independent scenario, through the observation of EPR steering. Our results prove that non-projective quantum measurements allows extending the limits for nonlocality-based certified randomness generation using current technology.
@article{arxiv.1711.10294,
title = {Experimental nonlocality-based randomness generation with non-projective measurements},
author = {S. Gómez and A. Mattar and E. S. Gómez and D. Cavalcanti and O. Jiménez Farías and A. Acín and G. Lima},
journal= {arXiv preprint arXiv:1711.10294},
year = {2018}
}