提出了一种多控制者的双向量子隐形传态方案。在该理论方案中有三个控制者协助通信,纠缠资源为最大七粒子纠缠态,其中通信者Alice和Bob以及三个控制者预先秘密共享最大七粒子纠缠态以构建量子信道。三个控制者的参与提高了通信的安全性,同时也避免了执行三粒子联合测量的复杂性。在通信过程中,首先Bob对自己密享的粒子执行酉操作,接着通信方各自对自己手中的粒子执行Bell基测量。假如控制者同意双方通信,便对自己手中的粒子执行单粒子测量并将测量结果通过经典信道传输给通信者。通信方分别结合控制者所公布的测量结果做相应的酉操作,这样便能完美地实现双向量子控制隐形传态。

A new two-way controllable quantum teleportation with several controllers scheme was proposed in this paper. There were three controllers who assisted communication in this theory scenario in which the entangled resources were the maximum seven-particle entangled states, and quantum communication channel was the maximum seven particle entangled states which contacted sender, receiver and controllers. The participation of three controllers improved the security and avoided the measurement complexity. In the communication process: firstly Bob performed unitary operation on his own particles, then the communicating carried out the Bell state measurements on their own particles. If the controllers agreed to intercommunication, he should measure his qubit and announce the result to the peer via classical channel. The communicating operated proper unitary operation according to the measurement results of the controllers so as to implement two-way control quantum teleportation successfully.