Generation of quantum logic operations from physical Hamiltonians (13 pages)
Generation of quantum logic operations from physical Hamiltonians (13 pages)
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从物理哈密顿量生成量子逻辑运算（13 页）
DOI：
10.1103/physreva.71.052317
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发表时间：
2004
影响因子：
2.9
通讯作者：
K. B. Whaley
中科院分区：
文献类型：
--
作者：
Jun Zhang;K. B. Whaley
我们对各种量子系统中可用于可扩展量子信息处理的哈密顿量的单量子位和两个量子位量子运算的物理生成进行了系统分析。我们证明，单量子位操作的生成可以转化为布洛赫球上的转向问题，该球代表单量子位操作的所有 R{sub z} 等价类，而两量子位问题通常可以转化为四面体中的转向问题，该四面体代表两量子位操作的所有局部等价类（Weyl 室）。我们使用这种方法来研究生成两个量子位运算的几个物理示例。引导方法为实现各种量子计算方案提供了有用的指导。
We provide a systematic analysis of the physical generation of single- and two-qubit quantum operations from Hamiltonians available in various quantum systems for scalable quantum information processing. We show that generation of single-qubit operations can be transformed into a steering problem on the Bloch sphere, which represents all R{sub z}-equivalence classes of single-qubit operations, whereas the two-qubit problem can be generally transformed into a steering problem in a tetrahedron representing all the local-equivalence classes of two-qubit operations (the Weyl chamber). We use this approach to investigate several physical examples for the generation of two-qubit operations. The steering approach provides useful guidance for the realization of various quantum computation schemes.