论文标题
与结构化环境接触的量子位的最佳控制和选择性
Optimal control and selectivity of qubits in contact with a structured environment
论文作者
论文摘要
我们介绍了对与结构化环境相互作用的量子的最佳控制的理论研究。我们考虑一个模型系统，其中浴缸是零温度下的玻色粒储层，而量子频率是唯一的控制参数。使用最佳控制技术，我们显示了可以操纵Qubit种群和放松效应的程度。通过数字发现具有固定最大强度的形状控制，可触及的Qubit状态。我们分析了标准控制机制的作用以及有关系统与环境之间的耦合强度相对于可及状态的结构。该研究用作探索两个与自己的浴室相互作用的未耦合量子位的选择性问题的起点，并以特定的耦合强度为特征。我们在数值上为广泛的参数得出了最佳控制解决方案，并且在某些特殊情况下，控制定律接近具有特定频率的正弦函数。
We present a theoretical study of the optimal control of a qubit interacting with a structured environment. We consider a model system in which the bath is a bosonic reservoir at zero temperature and the qubit frequency is the only control parameter. Using optimal control techniques, we show the extent to which qubit population and relaxation effects can be manipulated. The reachable qubit states by a shaped control with a fixed maximum intensity are found numerically. We analyze the role of standard control mechanisms and the structure of the set of reachable states with respect to the coupling strength between the system and the environment. This investigation is used as a starting point to explore the selectivity problem of two uncoupled qubits interacting with their own baths and characterized by a specific coupling strength. We numerically derive the optimal control solution for a wide range of parameters and we show that the control law is close to a sinusoidal function with a specific frequency in some peculiar cases.
