Practical and fast quantum random number generation based on photon arrival time relative to external reference
This provides a practical and fast quantum random number generator for applications requiring secure and efficient randomness, though it is incremental in improving bias reduction and speed.
The authors tackled the problem of generating high-speed quantum random numbers by measuring single-photon detection timing relative to an external reference, achieving a raw random bit rate of 109 Mbps and passing standard randomness tests after extraction.
We present a practical high-speed quantum random number generator, where the timing of single-photon detection relative to an external time reference is measured as the raw data. The bias of the raw data can be substantially reduced compared with the previous realizations. The raw random bit rate of our generator can reach 109 Mbps. We develop a model for the generator and evaluate the min-entropy of the raw data. Toeplitz matrix hashing is applied for randomness extraction, after which the final random bits are able to pass the standard randomness tests.