High-fidelity quantum gates via optimizing short pulse sequences in three-level systems

被引：7

作者：

Zhang, Cheng ^{[1
,2
]}

Liu, Yang ^{[1
,2
]}

Song, Jie ^{[3
]}

Xia, Yan ^{[1
,2
]}

Shi, Zhi-Cheng ^{[1
,2
]}

机构：

[1] Fuzhou Univ, Fujian Key Lab Quantum Informat & Quantum Opt, Fuzhou 350108, Peoples R China

[2] Fuzhou Univ, Dept Phys, Fuzhou 350108, Peoples R China

[3] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China

来源：

NEW JOURNAL OF PHYSICS | 2024年 / 26卷 / 01期

关键词：

composite pulse; optimal control; robust quantum control;

D O I：

10.1088/1367-2630/ad1a2a

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a robust and high-fidelity scheme for realizing universal quantum gates by optimizing short pulse sequences in a three-level system. To alleviate the sensitivity to the errors, we recombine all elements of error matrices to construct a cost function with three types of weight factors. The modulation parameters are obtained by searching for the minimum value of this cost function. The purposes of introducing the weight factors are to reduce the detrimental impact of high-order error matrices, suppress population leakage to the third state, correct the operational error in the qubit space, and optimize the total pulse area of short pulse sequences. The results demonstrate that the optimized sequences exhibit strong robustness against errors and effectively reduce the total pulse area. Therefore, this work presents a valuable method for achieving exceptional robustness and high speed in quantum computations.

引用

页数：15