Williams Brian P, Sadlier Ronald J, Humble Travis S
Quantum Computing Institute, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Phys Rev Lett. 2017 Feb 3;118(5):050501. doi: 10.1103/PhysRevLett.118.050501. Epub 2017 Feb 1.
Adopting quantum communication to modern networking requires transmitting quantum information through a fiber-based infrastructure. We report the first demonstration of superdense coding over optical fiber links, taking advantage of a complete Bell-state measurement enabled by time-polarization hyperentanglement, linear optics, and common single-photon detectors. We demonstrate the highest single-qubit channel capacity to date utilizing linear optics, 1.665±0.018, and we provide a full experimental implementation of a hybrid, quantum-classical communication protocol for image transfer.
将量子通信应用于现代网络需要通过基于光纤的基础设施来传输量子信息。我们报告了在光纤链路上超密集编码的首次演示，利用了由时间偏振超纠缠、线性光学和普通单光子探测器实现的完整贝尔态测量。我们利用线性光学展示了迄今为止最高的单量子比特信道容量，即1.665±0.018，并且我们提供了用于图像传输的混合量子-经典通信协议的完整实验实现。
