Massively parallel ultrafast random bit generation with a chip-scale laser
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- 26 February 2021
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 371 (6532), 948-952
- https://doi.org/10.1126/science.abc2666
Abstract
Random numbers are widely used for information security, cryptography, stochastic modeling, and quantum simulations. Key technical challenges for physical random number generation are speed and scalability. We demonstrate a method for ultrafast generation of hundreds of random bit streams in parallel with a single laser diode. Spatiotemporal interference of many lasing modes in a specially designed cavity is introduced as a scheme for greatly accelerated random bit generation. Spontaneous emission, caused by quantum fluctuations, produces stochastic noise that makes the bit streams unpredictable. We achieve a total bit rate of 250 terabits per second with off-line postprocessing, which is more than two orders of magnitude higher than the current postprocessing record. Our approach is robust, compact, and energy-efficient, with potential applications in secure communication and high-performance computation.Funding Information
- National Science Foundation (ECCS-1953959)
- Office of Naval Research (N00014-21-1-2026)
- Science Foundation Ireland (18/RP/6236)
- A*Star AME programmatic Grant (A18A7b0058)
- National Research Foundation Competitive Research Program (NRF-CRP-18-2017-02)
- National Research Foundation Competitive Research Program (NRF-CRP-19-2017-01)
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