Fig. 4: Experimental results.
From: Semi-device-independent quantum random number generator with a broadband squeezed state of light
a The measured noise power of the broadband squeezed state of light. Black curve: electronic noise level. Blue curve: shot-noise-limit (SNL) with the total LO power of 7.8 mW. Red curve: noise power of squeezed quadrature amplitude \(\hat{Q}\). Green curve: noise power of anti-squeezed quadrature phase \(\hat{P}\). The measured frequency is from 3.0 to 200.0 MHz, and a 6.5 ± 0.2 dB of squeezing at 3.0 MHz and 3.8 ± 0.2 dB of squeezing at 200.0 MHz below the corresponding SNL is observed. b The results of a typical run of the NIST test. In the case of multiple tests in a category, the smallest have been reported.
