Photon-Efficient High-Dimensional Quantum Key Distribution
Tian Zhong, Hongchao Zhou, Ligong Wang, Gregory W. Wornell, Zheshen Zhang, Jeffrey H. Shapiro, Franco N. C. Wong, Rob Horansky, Varun Verma, Adriana E. Lita, Richard P. Mirin, Thomas Gerrits, Sae Woo Nam, Alessandro Restelli, Joshua C. Bienfang, Francesco Marsili, Matthew D. Shaw · 2014
We demonstrate two high-dimensional QKD protocols — secure against collective Gaussian attacks — yielding up to 8.6 secure bits per photon and 6.7 Mb/s throughput, with 6.9 bits per photon after transmission through 20 km of fiber.