Fig. 1. Experimental setup of multiplex real-time quantum random number generation and post-processing based on quadrature fluctuations of vacuum state

Fig. 2. Measured power spectra of quantum shot noise of vacuum state

Fig. 3. Test results of NIST entropy for four sub-source signals

Fig. 4. Procedure framework of four-channel Toeplitz post-processing

Fig. 5. FPGA hardware resource occupancy of different channels and matrix size in Toeplitz-Hash post-processing

Fig. 6. Statistical distribution of random signals before and after real-time Toeplitz-Hash post-processing

Fig. 7. Cross correlation and mutual information between quantum random bit streams of every two channels. (a) Cross correlation;(b) mutual information

Fig. 8. 128×128 bitmaps of each channel quantum random bit streams and every two interchannel XOR results

Fig. 9. NIST test results for real-time quantum random number. (a) P value; (b) resource usage ratio

Fig. 10. Diehard test results for real-time quantum random number

Fig. 11. TestU01-SmallCrush test results for real-time quantum random number