TY - JOUR A1 - Gabriel, Christian A1 - Wittmann, Christoffer A1 - Sych, Denis A1 - Dong, Ruifang A1 - Mauerer, Wolfgang A1 - Andersen, Ulrik L. A1 - Marquardt, Christoph A1 - Leuchs, Gerd T1 - A generator for unique quantum random numbers based on vacuum states JF - Nature Photonics N2 - Random numbers are a valuable component in diverse applications that range from simulations over gambling to cryptography. The quest for true randomness in these applications has engendered a large variety of different proposals for producing random numbers based on the foundational unpredictability of quantum mechanics4,5,6,7,8,9,10,11. However, most approaches do not consider that a potential adversary could have knowledge about the generated numbers, so the numbers are not verifiably random and unique12,13,14,15. Here we present a simple experimental setup based on homodyne measurements that uses the purity of a continuous-variable quantum vacuum state to generate unique random numbers. We use the intrinsic randomness in measuring the quadratures of a mode in the lowest energy vacuum state, which cannot be correlated to any other state. The simplicity of our source, combined with its verifiably unique randomness, are important attributes for achieving high-reliability, high-speed and low-cost quantum random number generators. Y1 - 2010 U6 - https://doi.org/10.1038/nphoton.2010.197 VL - 4 IS - 10 SP - 711 EP - 715 PB - Springer ER - TY - CHAP A1 - Gabriel, Christian A1 - Wittmann, Christoffer A1 - Hacker, B. A1 - Mauerer, Wolfgang A1 - Huntington, E. A1 - Sabuncu, M. A1 - Marquardt, Christoph A1 - Leuchs, Gerd T1 - A high-speed secure quantum random number generator based on vacuum states T2 - IEEE/OSA Conference on Lasers and Electro-Optics (CLEO), 06-11 May 2012, San Jose CA USA N2 - A high-speed continuous-variable quantum random bit generator with an expected effective bit generation rate of up to 10 GBit/s is presented. The obtained bit sequences are truly random and unique, i.e. they cannot be known by an adversary. Y1 - 2012 PB - Optical Society of America ER -