Efficient Raman generation in a waveguide: A route to ultrafast quantum random number generation

The inherent uncertainty in quantum mechanics offers a source of true randomness which can be used to produce unbreakable cryptographic keys. We discuss the development of a high-speed random number generator based on the quantum phase fluctuations in spontaneously initiated stimulated Raman scatter...

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Bibliographic Details
Published in:Applied physics letters 2014-02, Vol.104 (5)
Main Authors: England, D. G., Bustard, P. J., Moffatt, D. J., Nunn, J., Lausten, R., Sussman, B. J.
Format: Article
Language:English
Subjects:
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPUTER CODES
Cryptography
FLUCTUATIONS
Numbers
PHOSPHATES
POTASSIUM COMPOUNDS
Potassium titanyl orthophosphate
QUANTUM CRYPTOGRAPHY
QUANTUM MECHANICS
RAMAN EFFECT
Raman spectra
Random numbers
RANDOMNESS
Variation
WAVEGUIDES
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Summary:The inherent uncertainty in quantum mechanics offers a source of true randomness which can be used to produce unbreakable cryptographic keys. We discuss the development of a high-speed random number generator based on the quantum phase fluctuations in spontaneously initiated stimulated Raman scattering (SISRS). We utilize the tight confinement and long interaction length available in a Potassium Titanyl Phosphate waveguide to generate highly efficient SISRS using nanojoule pulse energies, reducing the high pump power requirements of the previous approaches. We measure the random phase of the Stokes output using a simple interferometric setup to yield quantum random numbers at 145 Mbps.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4864095