Random numbers are a basic ingredient of simulation algorithms and cryptography, and play a significant part in computer simulation and information processing. One prominent feature of a squeezed light is its lower fluctuation and more randomness in a pair of orthogonal oriented quadratures, thus it prompts a significant application in not only quantum information and quantum precision measurement but also an excellent entropy source for true random number generation. Here we report a generation of a high-efficiency semi-device-independent quantum random number based on a broadband squeezed light, where a reliable randomness source is unnecessary and a noisy local oscillator is allowed for homodyne detection. The equivalent generation of private random bits is at a rate of 580.7 Mbps. In addition, the use of squeezed light at 1.3 μm enables the transmission of entropy sources and local oscillators at the metropolitan scale, thus expanding the potential applications of quantum random number generators based on non-classical state of light.

随机数是模拟算法和密码学的基本组成部分，在计算机模拟和信息处理中发挥着重要作用。压缩光的一个显着特征是其在一对正交定向正交中具有较低的波动性和较高的随机性，因此它不仅在量子信息和量子精密测量中具有重要的应用，而且也是产生真正随机数的优秀熵源。在这里，我们报告了基于宽带压缩光的高效半设备无关量子随机数的生成，其中不需要可靠的随机源，并且允许使用嘈杂的本地振荡器进行零差检测。私有随机位的等效生成速率为 580.7 Mbps。此外，利用1.3μm压缩光可以实现城市尺度的熵源和本地振荡器的传输，从而扩展了基于非经典光态的量子随机数发生器的潜在应用。