用多粒子态进行量子信息分配

我们提出一个用五粒子态将量子信息分裂成几部分的方案.在这个过程中,如果有且只有接受者相互合作才能重建初始比特的态.我们所用的量子通道是Bell态和三比特GHZ态的组合态,这些态在实验上都是很容易制备的.这个方案对某些窃听攻击来说是安全的.而且,它还可以用来实现控制的量子隐形传态.

Quantum-information splitting using multi-particle state

We propose a scheme for the splitting up of quantum information into parts using a five-particle state.In the procedure the original qubits'state can be reconstructed if and only if the receivers cooperate with each other.The quantum channel we used is the combined state of the Bell state and the three-qubit Greenberger-Horne-Zeilinger state,which are all easily prepared in experiment.The scheme is secure against certain eavesdropping attacks.In addition,it can also be modified to implement controlled teleportation.