Experimental Monte Carlo quantum process certification.
Experimental Monte Carlo quantum process certification.
复制标题
实验蒙特卡罗量子过程认证。
DOI：
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发表时间：
2012
影响因子：
8.6
通讯作者：
A. Wallraff
中科院分区：
文献类型：
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作者：
L. Steffen;A. Fedorov;M. Baur;Marcus P. da Silva;A. Wallraff
量子信息处理的实验实现现在已经达到了量子过程断层扫描不切实际的复杂程度。现在，实验设置的数量以及数据后处理的计算成本甚至需要数天的时间才能表征甚至只有 8 个量子位的实验。最近提出了一种更实用的方法来确定实验量子过程的保真度，其中使用蒙特卡罗采样将实验数据直接与理想过程进行比较。在这里，我们在电路量子电动力学设置中展示了该方案的实验实现，以确定 2 量子位门（例如 CPHASE 和 CNOT 门）和 3 量子位门（例如 Toffoli 门和两个连续 CPHASE 门）的保真度。
Experimental implementations of quantum information processing have now reached a level of sophistication where quantum process tomography is impractical. The number of experimental settings as well as the computational cost of the data postprocessing now translates to days of effort to characterize even experiments with as few as 8 qubits. Recently a more practical approach to determine the fidelity of an experimental quantum process has been proposed, where the experimental data are compared directly with an ideal process using Monte Carlo sampling. Here, we present an experimental implementation of this scheme in a circuit quantum electrodynamics setup to determine the fidelity of 2-qubit gates, such as the CPHASE and the CNOT gate, and 3-qubit gates, such as the Toffoli gate and two sequential CPHASE gates.