Abstract
Random number sequences are a critical resource in modern information processing systems, with applications in cryptography, numerical simulation, and data sampling. We introduce a quantum random number generator based on the measurement of pulse energy quantum fluctuations in Stokes light generated by spontaneously-initiated stimulated Raman scattering. Bright Stokes pulse energy fluctuations up to five times the mean energy are measured with fast photodiodes and converted to unbiased random binary strings. Since the pulse energy is a continuous variable, multiple bits can be extracted from a single measurement. Our approach can be generalized to a wide range of Raman active materials; here we demonstrate a prototype using the optical phonon line in bulk diamond.
Highlights
Random binary keys (RBKs) are a critical resource in modern cyber security systems
We have introduced and demonstrated a technique for generating sequences of quantum random bits by measuring the randomly fluctuating pulse energy of Stokes light generated via spontaneously initiated stimulated Raman scattering (SISRS)
The randomness of the bits is guaranteed by the quantum mechanical origin of the Stokes pulse energy fluctuations
Summary
Random binary keys (RBKs) are a critical resource in modern cyber security systems. They are used to convert plain text messages into secure ciphers for transmission over open channels. Quantum random bit generators (QRBGs) can create keys with guaranteed security because they use fundamentally random outcomes from measurements on suitable quantum systems. We summarize our QRBG research results; we measured pulse energy fluctuations in Stokes light from spontaneously initiated stimulated Raman scattering (SISRS) and converted the measurements to truly random, unbiased binary sequences. 2. Random fluctuations can be measured in the pulse energy of Stokes pulses generated using SISRS. 3. Measured Stokes pulse energies can be converted to high-quality RBKs which pass standard tests of randomness
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