Quantum Random Number Generator using Photon-Number Path Entanglement
  We report a novel quantum random number generator based on the photon-number$-$path entangled state which is prepared via two-photon quantum interference at a beam splitter. The randomness in our scheme is of truly quantum mechanical origin as it comes from the projection measurement of the entangled two-photon state. The generated bit sequences satisfy the standard randomness test. 
Osung Kwon, Young-Wook Cho, Yoon-Ho Kim