1.
Fang, X.-T., Zeng, P., Liu, H., Zou, M., Wu, W., Tang, Y.-L., Sheng, Y.-J., Xiang, Y., Zhang, W., Li, H., Wang, Z., You, L., Li, M.-J., Chen, H., Chen, Y.-A., Zhang, Q., Peng, C.-Z., Ma, X., Chen, T.-Y. & Pan, J.-W. Implementation of quantum key distribution surpassing the linear rate-transmittance bound. Nature Photonics 14, 422–425 (2020).