Decoy-state reference-frame-independent quantum key distribution with the heralded pair-coherent source Xiang Li, Chenchen Mao, Jianrong Zhu, Chunmei Zhang and Qin Wang Eur. Phys. J. D, 73 5 (2019) 86 Published online: 02 May 2019 DOI: 10.1140/epjd/e2019-100001-x