Quantum Signal Splitting that Avoids Initialization of the Targets
Quantum Signal Splitting that Avoids Initialization of the Targets
复制标题
避免目标初始化的量子信号分裂
DOI：
10.1142/s0217984997001523
复制
发表时间：
1996
影响因子：
1.9
通讯作者：
V. Privman
中科院分区：
文献类型：
--
作者：
D. Mozyrsky;V. Privman
经典的信号分裂和复制在量子力学中是不可能的。具体地说，如果复制（C）和复制（D）两态系统最初处于任意状态，则不能将输入（I）两态系统（量子比特，自旋）的基本上和下状态复制到复制（C）和复制（D）两态系统中。相反，我们考虑量子演化，其中I在时间t的基态在时间t+Δt的至少两个系统I、C、D中复制。本质上，对初始目标状态的限制被交换为关于三个量子位中的哪两个保留初始源状态的副本的不确定性。
The classical signal splitting and copying are not possible in quantum mechanics. Specifically, one cannot copy the basis up and down states of the input (I) two-state system (qubit, spin) into the copy (C) and duplicate-copy (D) two-state systems if the latter systems are initially in an arbitrary state. We consider instead a quantum evolution in which the basis states of I at time t are duplicated in at least two of the systems I, C, D, at time t+Δt. In essence, the restriction on the initial target states is exchanged for uncertainty as to which two of the three qubits retain copies of the initial source state.