Round-Robin Differential Phase Shift Quantum Key Distribution Protocol Based on Orbital Angular Momentum

Zhigang, 沈志冈 Shen; Le, 王乐 Wang; Qianping, 毛钱萍 Mao; Shengmei, 赵生妹 Zhao

doi:10.3788/aos201939.0227001

Cited by 1 publication

(1 citation statement)

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“…For example, Mirhosseini et al verified the high-dimensional QKD experiments encoded by OAM and weakly coherent states in [24]. We proposed the theoretical analysis of MDI-QKD protocol based on OAM in [25], and we presented the OAM based round-robin differential-phase-shift QKD protocol in [26]. Recently, Meng and Lai [27] improved TF-QKD with the photon OAM to overcome the reference frame dependence.…”

Section: Introductionmentioning

confidence: 98%

Phase-matching quantum key distribution based on orbital angular momentum under atmospheric turbulence

Shen¹,

Chen²,

Wang³

et al. 2022

Laser Phys. Lett.

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We propose a phase-matching quantum key distribution (PM-QKD) protocol based on orbital angular momentum (OAM) to exceed the linear key-rate bound without quantum repeater in the paper, named OAM-PM-QKD protocol, where the coherent state consisting of OAM with opposite topological charges is used as the information carrier. With the equivalent entanglement distillation model, we analyze its security and then derive its key generation rate. The numerical simulation results show that the proposed OAM-PM-QKD protocol is able to exceed the linear key-rate bound when the transmission distance exceeds 230 km, and the maximum secure transmission distance is also longer than those of original PM-QKD protocol due to no misalignment in the basis. Furthermore, the influence of the atmospheric turbulence (AT) on the key generation rate is also discussed. The stronger the strength of AT is, the shorter the transmission distance is.

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