基于Bell态的任意两粒子态对称双向远程制备

Symmetric bidirectional remote preparation of arbitrary two qubits states using Bell-state

提出了一种利用4个Bell纠缠态量子信道双向对称远程制备任意两粒子态方案。初态为实系数情况下,Alice和Bob分别利用与量子信道相匹配的正交测量基对粒子(1,3)位和(6,8)位投影测量;初态为复系数情况下,Alice和Bob分别引入辅助粒子(A1,A2)和(B1,B2),利用实数测量基对各自的粒子(1,3)和(6,8)进行投影测量后,分别使用与信道和实数测量基相匹配的复数测量基对粒子(A1,A2)和(B1,B2)进行投影测量。接收方收到对方的测量结果后,对每一种测量结果进行与测量基相对应的幺正变换操作,完成任意两粒子态对称双向远程制备。经过计算和验证,本方案制备成功的概率为100%,系统的信息传送效率为20%。

A bidirectional remote state preparation scheme for arbitrary two-qubit states using four Bell entangled state quantum channels is proposed.When the initial state is in the real coefficient,Alice and Bob use orthogonal measurement basis matched with the quantum channel to measure qubits(1,3)and(6,8);When the initial state is in complex coefficient,Alice and Bob introduce auxiliary particles(A1,A2)and(B1,B2)respectively,and use above mentioned measurement basis to carry out projection measurement on their respective qubits(1,3)and(6,8).The projection measurement of particles(A1,A2)and(B1,B2)is carried out by using complex measurement basis matching the channel and the real measurement basis.After receiving the measurement result of the other side,the receiver carries out unitary transformation operation corresponding to the measurement basis for each measurement result and completes the symmetric bidirectional remote preparation of arbitrary two-qubit states.Calculation and verification show that the probability of successful preparation by this scheme is 100%,and the information transfer efficiency of the system is 20%.