高维不对称受控隐形传态方案及优化

An asymmetric controlled bidirectional teleportation scheme and optimization

利用高维最大纠缠量子态作为信道,提出一种不对称受控双向隐形传态方案。通信双方Alice、Bob和控制者Charlie事先秘密共享纠缠态,用于构建量子信道。通信开始后,根据纠缠粒子的分发方式以及对测量基的不同选择,通信双方Alice和Bob可以在控制者Charlie的监督下,以一定概率分别将一个高维单粒子态和一个高维二粒子态传送给对方,进而通过对测量基的优化进一步提升传输成功概率,使得传输成功概率从1/d提升到1,最终实现完美隐形传态。所提出方案中只使用广义贝尔基测量及单粒子测量,在物理上容易实现。改进后的方案中,Charlie可以对两条信道进行控制,提高了方案的安全性。

Using high-dimensional maximally entangled quantum states as channels,an asymmetric controlled bidirectional teleportation scheme is proposed and optimized.The senders(Alice and Bob)and the controller(Charlie)secretly share entangled state in advance to construct quantum channel.Once the communication begins,according to the distribution mode of entangled particles and the different choice of measurement basis,Alice and Bob respectively transmit a single-particle state and a two-particle state in high-dimensional space to each other,under the supervision of Charlie.By optimizing the measurement basis,the success probability raised from 1/d to 1 and the asymmetric controlled bidirectional teleportation is implemented successfully.At the same time,it is physically easy to achive by using generalized Bell-basis measurement and single-qubit measurement only.The improved scheme allows Charlie to control both channels,increasing the security of the scheme.