论文标题
基于半设备的非依赖性杂作量子随机数发生器
Semi-Device-Independent Heterodyne-based Quantum Random Number Generator
论文作者
论文摘要
随机性是量子力学的基本特征，这是古典技术和量子技术的宝贵资源。实用的量子随机数生成器（QRNG）通常需要信任其设备，但是在不完美或恶意外部操作的情况下，其安全性可能会受到危害。在这项工作中，我们提出了与半设备无关的QRNG的强大实施，该QRNG可以保证安全率和快速发电率。该系统在准备和测量场景中工作，其中测量和来源是不受信任的，但是假定准备好状态的能量。我们的实施利用了异义检测，与替代测量策略相比，它提供了提高的发电率和提高的长期稳定性。特别是，由于异差测量的层析成分特性，我们可以通过后处理来补偿快速波动，避免复杂的主动相位稳定系统。结果，我们的计划将高安全性和速度与仅包含商业式上的组件的简单设置相结合，在许多实际情况下，它是一个有吸引力的解决方案。
Randomness is a fundamental feature of quantum mechanics, which is an invaluable resource for both classical and quantum technologies. Practical quantum random number generators (QRNG) usually need to trust their devices, but their security can be jeopardized in case of imperfections or malicious external actions. In this work, we present a robust implementation of a Semi-Device-Independent QRNG that guarantees both security and fast generation rates. The system works in a prepare and measure scenario where measurement and source are untrusted, but a bound on the energy of the prepared states is assumed. Our implementation exploits heterodyne detection, which offers increased generation rate and improved long-term stability compared to alternative measurement strategies. In particular, due to the tomographic properties of heterodyne measurement, we can compensate for fast phase fluctuations via post-processing, avoiding complex active phase stabilization systems. As a result, our scheme combines high security and speed with a simple setup featuring only commercial-off-the-shelf components, making it an attractive solution in many practical scenarios.
