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Source-device-independent heterodyne-based quantum random number generator at 17 Gbps
Marco Avesani1, Davide G Marangon1, Giuseppe Vallone1,2
1Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Padova, Via Gradenigo 6B, 35131, Padova, Italy.
Nature Communications
|December 19, 2018
Summary
This study introduces a novel protocol for generating secure and ultra-fast random numbers, crucial for cryptography and scientific simulations. The new method ensures randomness without needing an initial source, achieving high-speed secure generation.
Area of Science:
- Quantum Information Science
- Applied Physics
Background:
- Random number generation is vital for scientific simulations and security applications like cryptography.
- Existing practical random number generators (RNGs) face security risks due to potential imperfections or external interference.
- Ultra-fast and private random number generation is critical for advanced applications such as Bell's tests.
Purpose of the Study:
- To develop an efficient protocol for generating random numbers that guarantees both security and high speed.
- To propose a source-device-independent protocol applicable to various measurement types.
- To experimentally validate the protocol's performance and security.
Main Methods:
- Introduced a source-device-independent protocol utilizing generic Positive Operator Valued Measurements (POVMs).
- Specialized the protocol for heterodyne measurements, a common technique in quantum optics.
- Implemented the protocol experimentally to assess its practical capabilities.
Main Results:
- Achieved a secure random number generation rate of 17.42 Gbit/s.
- Demonstrated the protocol's effectiveness without requiring an initial source of randomness.
- Provided a security proof against general attacks in a finite key scenario.
Conclusions:
- The developed protocol offers a significant advancement in secure and high-speed random number generation.
- The source-device-independent nature enhances security by mitigating risks associated with the random number source.
- Experimental validation confirms the protocol's practical feasibility and performance for demanding applications.
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