Robust quantum random number generator based on avalanche photodiodes

TL;DR

This paper presents a room-temperature quantum random number generator using avalanche photodiodes, achieving high efficiency and robustness against noise, with potential for high-speed chip integration.

Contribution

The authors introduce a novel scheme for quantum RNG that is robust, efficient, and compatible with simple time bin encoding, eliminating the need for a light source.

Findings

Achieved a random bit rate of 0.69 Mbps with double APDs.

Demonstrated robustness against pulse intensity and temperature fluctuations.

Potential for high-speed, integrable RNG chips.

Abstract

We propose and demonstrate a scheme to realize a high-efficiency truly quantum random number generator (RNG) at room temperature (RT). Using an effective extractor with simple time bin encoding method, the avalanche pulses of avalanche photodiode (APD) are converted into high-quality random numbers (RNs) that are robust to slow varying noise such as fluctuations of pulse intensity and temperature. A light source is compatible but not necessary in this scheme. Therefor the robustness of the system is effective enhanced. The random bits generation rate of this proof-of-principle system is 0.69 Mbps with double APDs and 0.34 Mbps with single APD. The results indicate that a high-speed RNG chip based on the scheme is potentially available with an integrable APD array.