Nonadiabatic controlled-NOT gate for the Kane solid-state quantum computer
Nonadiabatic controlled-NOT gate for the Kane solid-state quantum computer
复制标题
凯恩固态量子计算机的非绝热受控非门
DOI：
10.1103/physreva.65.032303
复制
发表时间：
2001
影响因子：
2.9
通讯作者：
H.C.Pauli
中科院分区：
文献类型：
--
作者：
C. Wellard;L. Hollenberg;H.C.Pauli
利用迭代预解器的方法，得到了凯恩固态量子计算机中相邻量子比特的有效哈密顿量。与凯恩提议中固有的绝热门过程相反，我们证明了由这个有效的哈密顿量产生的量子比特-量子比特系统的自由演化，结合单量子比特操作，足以产生受控非门。因此，可以在凯恩量子计算机上获得通常的一组通用门，而不需要像凯恩[自然(伦敦)393,133(1998)]所规定的那样绝热地切换可控参数。通过数值模拟确定了这种非绝热受控非门的保真度和选通时间。
The method of iterated resolvents is used to obtain an effective Hamiltonian for neighboring qubits in the Kane solid-state quantum computer. In contrast to the adiabatic gate processes inherent in the Kane proposal we show that free evolution of the qubit-qubit system, as generated by this effective Hamiltonian, combined with single-qubit operations, is sufficient to produce a controlled-NOT gate. Thus the usual set of universal gates can be obtained on the Kane quantum computer without the need for adiabatic switching of the controllable parameters as prescribed by Kane [Nature (London) 393, 133 (1998)]. Both the fidelity and the gate time of this nonadiabatic controlled-NOT gate are determined by numerical simulation.