Multiplexed Quantum Random Number Generation

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Author(s)
Haylock, Ben
Peace, Daniel
Lenzini, Francesco
Weedbrook, Christian
Lobino, Mirko
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2019
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Abstract

Fast secure random number generation is essential for high-speed encrypted communication, and is the backbone of information security. Generation of truly random numbers depends on the intrinsic randomness of the process used and is usually limited by electronic bandwidth and signal processing data rates. Here we use a multiplexing scheme to create a fast quantum random number generator structurally tailored to encryption for distributed computing, and high bit-rate data transfer. We use vacuum fluctuations measured by seven homodyne detectors as quantum randomness sources, multiplexed using a single integrated optical device. We obtain a real-time random number generation rate of 3.08 Gbit/s, from only 27.5 MHz of sampled detector bandwidth. Furthermore, we take advantage of the multiplexed nature of our system to demonstrate an unseeded strong extractor with a generation rate of 26 Mbit/s.

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Quantum

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3

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© 2019 The Author(s). This Paper is published in Quantum under the Creative Commons Attribution 4.0 International (CC BY 4.0) license. Copyright remains with the original copyright holders such as the authors or their institutions.

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Subject

Theory of computation

Information systems

Science & Technology

Physical Sciences

Quantum Science & Technology

Physics

RANDOM BIT GENERATION

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Haylock, B; Peace, D; Lenzini, F; Weedbrook, C; Lobino, M, Multiplexed Quantum Random Number Generation, Quantum, 2019, 3

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