论文标题
最佳控制量子制剂制备和纠缠在具有界振幅的两倍量子系统中的最佳控制
Optimal control of quantum state preparation and entanglement creation in two-qubit quantum system with bounded amplitude
论文作者
论文摘要
我们考虑具有有界振幅的两分Quient系统中的最佳控制问题。研究了两种情况：量子状态准备和纠缠创造。成本函数，保真度和同意，分别针对总持续时间的不同值进行了爆炸控制。对于量子状态准备问题，以高精度确定三个关键时间点，并在不同的持续时间内获得最佳控制。可以更好地估计量子速度极限，因此时间最佳控制也是如此。对于纠缠创建问题，确定了两个关键时间点，其中之一是从产品状态开始实现最大纠缠（单位并发）的最小时间。另外，找到达到单元并发的最佳控制。
We consider the optimal control problem in a two-qubit system with bounded amplitude. Two cases are studied: quantum state preparation and entanglement creation. Cost functions, fidelity and concurrence, are optimized over bang-off controls for different values of the total duration, respectively. For quantum state preparation problem, three critical time points are determined with high precision, and optimal controls are obtained for different durations. A better estimation of the quantum speed limit is obtained, so is the time-optimal control. For entanglement creation problem, two critical time points are determined, one of them is the minimal time to achieve maximal entanglement (unit concurrence) starting from the product state. In addition, the optimal control to reach the unit concurrence is found.
