Lu Runyu, Liu Kaipeng, Ban Yue
School of Materials Science and Engineering, Shanghai University, Shanghai 200444, People's Republic of China.
International Center of Quantum Artificial Intelligence for Science and Technology (QuArtist) and Department of Physics, Shanghai University, Shanghai 200444, People's Republic of China.
Philos Trans A Math Phys Eng Sci. 2022 Dec 26;380(2239):20210270. doi: 10.1098/rsta.2021.0270. Epub 2022 Nov 7.
Robust and efficient manipulation of electron spin qubits in quantum dots is of great significance for the reliable realization of quantum computers and execution of quantum algorithms. In this paper, we study the robust control on a singlet-triplet qubit based on inverse engineering, one technique of shortcuts to adiabaticity (STA), in a nanowire double quantum dot in the presence of magnetic field and strong spin-orbit coupling. The optimization of STA with respect to the systematic errors, contributed from the control field and the perturbative interaction, is explored. Moreover, we also apply optimal control techniques combining with STA, referred to as robust inverse optimization, to design optimal control fields and optimal operation time. This article is part of the theme issue 'Shortcuts to adiabaticity: theoretical, experimental and interdisciplinary perspectives'.
在量子点中对电子自旋量子比特进行稳健且高效的操控，对于可靠实现量子计算机以及执行量子算法具有重大意义。在本文中，我们研究了在存在磁场和强自旋轨道耦合的纳米线双量子点中，基于绝热捷径（STA）技术之一的逆工程，对单重态 - 三重态量子比特的稳健控制。探讨了针对由控制场和微扰相互作用引起的系统误差对STA进行优化。此外，我们还应用与STA相结合的最优控制技术，即稳健逆优化，来设计最优控制场和最优操作时间。本文是主题为“绝热捷径：理论、实验和跨学科视角”特刊的一部分。
