报告时间：7月27日 周四 下午3:00
报告题目： Long-distance quantum communication with quantum repeaters
Efficient long-distance (≥1000 km) quantum communication remains an outstanding challenge due to fiber attenuation and operation errors accumulated over the entire communication distance. Quantum repeaters (QRs), as a promising approach, can overcome both photon loss and operation errors, and significantly speedup the communication rate. Depending on the methods used to correct the two errors, all the proposed QR schemes can be classified into three generations. In this talk, I will present the first systematic comparison of the three generations by evaluating the cost of both temporal and physical resources. The application of cat codes as a single-mode encoding scheme to one-way QRs (i.e. the third generation) will be discussed. We will show that QRs with cat codes can lead to ultra-high secure key rate per mode.
 S. Muralidharan*, L. Li*, J. Kim, N. Lu?tkenhaus, M. D. Lukin, and L. Jiang, Sci. Rep. 6, 20463 (2016).
 L. Li, C.-L. Zou, V. V. Albert, S. Muralidharan, S. M. Girvin, and L. Jiang, Phys. Rev. Lett. (Accepted).
报告人简介:Linshu is a PhD candidate at the Department of Applied Physics at Yale University, USA. He has been working on novel quantum error correcting codes, long distance quantum communication and quantum networks. He received his B.Sc. in Physics with honors from Nanjing University, China.