A self-testing quantum random number generator
  The generation of random numbers is a task of paramount importance in modern science. A central problem for both classical and quantum randomness generation is to estimate the entropy of the data generated by a given device. Here we present a protocol for self-testing quantum random number generation, in which the user can monitor the entropy in real-time. Based on a few general assumptions, our protocol guarantees continuous generation of high quality randomness, without the need for a detailed characterization of the devices. Using a fully optical setup, we implement our protocol and illustrate its self-testing capacity. Our work thus provides a practical approach to quantum randomness generation in a scenario of trusted but error-prone devices. 
Tommaso Lunghi, Jonatan Bohr Brask, Charles Ci Wen Lim, Quentin   Lavigne, Joseph Bowles, Anthony Martin, Hugo Zbinden, Nico...
quant-ph