论文标题
用于量子信息处理的多核光纤集成的多端口梁插座
Multi-core fiber integrated multi-port beamsplitters for quantum information processing
论文作者
论文摘要
多端口梁插座是用于高维量子信息任务的基石设备，可以优于二维情况。尽管如此，这种设备的制造才被证明是在综合光子学的出现时才能实现的进步具有挑战性。在这里，我们根据操纵多核光纤的新方案报告了高质量$ n \ times n $（$ n = 4,7 $）的多端口梁板岩的生产。通过探索其与光纤组件的兼容性，我们创建了4维量子系统，并通过以2 MHz的重复速率运行的可编程4臂干涉仪实现了与测量设备无关的随机数生成任务。由于观察到的高可见性，我们超过了二进制协议的1位限制，并且每次实验回合获得了1.23位认证的私人随机性。我们的结果表明，可以通过多核光纤技术同时实现快速切换，低损坏和高光学质量，以同时实现高维量子信息。
Multi-port beamsplitters are cornerstone devices for high-dimensional quantum information tasks, which can outperform the two-dimensional ones. Nonetheless, the fabrication of such devices has been proven to be challenging with progress only recently achieved with the advent of integrated photonics. Here, we report on the production of high-quality $N \times N$ (with $N=4,7$) multi-port beamsplitters based on a new scheme for manipulating multi-core optical fibers. By exploring their compatibility with optical fiber components, we create 4-dimensional quantum systems and implement the measurement-device-independent random number generation task with a programmable 4-arm interferometer operating at a 2 MHz repetition rate. Thanks to the high visibilities observed, we surpass the 1-bit limit of binary protocols and attain 1.23 bits of certified private randomness per experimental round. Our result demonstrates that fast switching, low-loss and high optical quality for high-dimensional quantum information can be simultaneously achieved with multi-core fiber technology.
