Simple source device-independent continuous-variable quantum random number generator

Autor: Smith, Peter Raymond, Marangon, Davide G., Lucamarini, Marco, Yuan, Zhiliang, Shields, Andrew
Rok vydání: 2019
Předmět:
Zdroj: Physical Review A 99, 062326 (2019)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevA.99.062326
Popis: Phase-randomized optical homodyne detection is a well-known technique for performing quantum state tomography. So far, it has been mainly considered a sophisticated tool for laboratory experiments but unsuitable for practical applications. In this work, we change the perspective and employ this technique to set up a practical continuous-variable quantum random number generator. We exploit a phase-randomized local oscillator realized with a gain-switched laser to bound the min-entropy and extract true randomness from a completely uncharacterized input, potentially controlled by a malicious adversary. Our proof-of-principle implementation achieves an equivalent rate of 270 Mbit/s. In contrast to other source-device-independent quantum random number generators, the one presented herein does not require additional active optical components, thus representing a viable solution for future compact, modulator-free, certified generators of randomness.
Databáze: arXiv