title: Proof-of-principle experiment of reference-frame-independent quantum key distribution with phase coding.
abstract: We have demonstrated a proof-of-principle experiment of reference-frame-independent phase coding quantum key distribution (RFI-QKD) over an 80-km optical fiber. After considering the finite-key bound, we still achieve a distance of 50 km. In this scenario, the phases of the basis states are related by a slowly time-varying transformation. Furthermore, we developed and realized a new decoy state method for RFI-QKD systems with weak coherent sources to counteract the photon-number-splitting attack. With the help of a reference-frame-independent protocol and a Michelson interferometer with Faraday rotator mirrors, our system is rendered immune to the slow phase changes of the interferometer and the polarization disturbances of the channel, making the procedure very robust.
authors.affiliation: 1] Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, China [2] Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Wen-Ye
authors.initials: WY
authors.lastname: Liang
authors.affiliation: 1] Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, China [2] Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Wang
authors.affiliation: 1] Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, China [2] Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Hong-Wei
authors.initials: HW
authors.lastname: Li
authors.affiliation: 1] Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, China [2] Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Zhen-Qiang
authors.initials: ZQ
authors.lastname: Yin
authors.affiliation: 1] Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, China [2] Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.affiliation: 1] Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, China [2] Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Yao
authors.affiliation: 1] Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, China [2] Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Jing-Zheng
authors.initials: JZ
authors.lastname: Huang
authors.affiliation: 1] Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, China [2] Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Guang-Can
authors.initials: GC
authors.lastname: Guo
authors.affiliation: 1] Key Laboratory of Quantum Information, University of Science and Technology of China, CAS, Hefei, Anhui 230026, China [2] Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Zheng-Fu
authors.initials: ZF
authors.lastname: Han