Exact two-qubit universal quantum circuit.
Exact two-qubit universal quantum circuit.
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DOI：
10.1103/physrevlett.91.027903
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发表时间：
2002-12
影响因子：
8.6
通讯作者：
Jun Zhang;J. Vala;S. Sastry;K. B. Whaley
中科院分区：
文献类型：
--
作者：
Jun Zhang;J. Vala;S. Sastry;K. B. Whaley
我们提供了一种分析的方法来实现任何任意的两个量子比特的幺正操作，给定一个纠缠的两个量子比特的门与本地门在一起。这被证明提供了一个通用的量子电路，精确地模拟任意的SU（4）中的两个量子比特操作的显式构造。该电路中的每个块都以封闭形式给出。我们还提供了一个统一的上限的应用程序的纠缠门，并发现，正好有一半的所有控制酉门满足相同的上限作为CNOT门。这些结果允许在SU（4）中有效地实现量子计算和量子模拟所需的操作。
We provide an analytic way to implement any arbitrary two-qubit unitary operation, given an entangling two-qubit gate together with local gates. This is shown to provide explicit construction of a universal quantum circuit that exactly simulates arbitrary two-qubit operations in SU(4). Each block in this circuit is given in a closed form solution. We also provide a uniform upper bound of the applications of the given entangling gates, and find that exactly half of all the controlled-unitary gates satisfy the same upper bound as the CNOT gate. These results allow for the efficient implementation of operations in SU(4) required for both quantum computation and quantum simulation.