Quantum random bit generation using energy fluctuations in stimulated Raman scattering

Area of Science:

• Quantum Optics
• Condensed Matter Physics
• Information Security

Background:

• Random number sequences are essential for secure communication, simulations, and data analysis.
• Existing random number generators face challenges in true randomness and efficiency.
• Quantum phenomena offer a path to fundamentally secure and efficient random number generation.

Purpose of the Study:

• To develop a quantum random number generator (QRNG) utilizing quantum fluctuations in stimulated Raman scattering.
• To demonstrate a practical QRNG prototype with high potential for generating unbiased random binary strings.
• To explore the generalization of this method to various Raman-active materials.

Main Methods:

• Utilizing spontaneously-initiated stimulated Raman scattering in bulk diamond.
• Measuring pulse energy quantum fluctuations in Stokes light using fast photodiodes.
• Converting continuous variable pulse energy measurements into unbiased random binary strings.

Main Results:

• Demonstrated a prototype quantum random number generator based on diamond Raman scattering.
• Successfully measured bright Stokes pulse energy fluctuations significantly exceeding the mean energy.
• Generated unbiased random binary strings from continuous quantum fluctuations, enabling multi-bit extraction per measurement.

Conclusions:

• The developed quantum random number generator offers a novel and efficient method for producing high-quality random numbers.
• The approach leverages quantum fluctuations in stimulated Raman scattering, applicable to various materials.
• This technology has significant implications for cryptography, secure communications, and advanced computational methods.