Tools from Quantum System and Control Theory

量子系统和控制理论的工具

• 批准号: 173182796
• 负责人: Dr. Thomas Schulte-Herbrüggen
• 金额: --
• 依托单位: Lehrstuhl für Organische Chemie I
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/173182796?language=en
• 关键词: Tools; Quantum; System; Control; Theory

In order to fully exploit the advantageous properties of diamond NV centers as quantum registers or as quantum processors, the endurance of the memory and the precision of its read/write processes has to be taken to the limit. In quantum processors, analogous requirements hold for the computational gates. At the same time the system should be protected against relaxative losses. Moreover, in spite of state-of-the-art material engineering, the coupling architecture among the neighboring qubits is bound to have minor yet inevitable (dipolar) long-range coupling interactions. Thus a realistic architecture (hardware) is usually non-ideal and has to be compensated for by the steering controls (software). — In order to meet the combination of all these challenges, numerical methods of optimal control are tantamount. Therefore, it is the scope of this subproject to provide methods and algorithms for designing optimal controls under given non-idealty and experimental limitations. They may also comprise constraints as keeping the system dynamics In some decoherence-protected subspace or amount to compromised external controls. Upon further refinement, one has to address a system with partially unknown parameters of the master equation.

为了充分利用金刚石NV中心作为量子寄存器或量子处理器的有利特性，必须将存储器的耐久性及其读/写过程的精度带到极限。在量子处理器中，类似的要求适用于计算门。与此同时，应保护系统免受弛豫损失。此外，尽管有最先进的材料工程，但相邻量子位之间的耦合架构必然具有较小但不可避免的（偶极）长程耦合相互作用。因此，一个现实的架构（硬件）通常是不理想的，必须通过转向控制（软件）进行补偿。- 为了满足所有这些挑战的组合，最优控制的数值方法是等同的。因此，该子项目的范围是提供在给定的非理想和实验限制下设计最优控制的方法和算法。它们还可以包括约束，如将系统动态保持在某些消相干保护的子空间中或相当于妥协的外部控制。在进一步的细化，一个必须解决的系统与部分未知的参数的主方程。