论文标题
在非交通和两分量子动力学中对哈密顿参数估计的最佳控制
Optimal control for Hamiltonian parameter estimation in non-commuting and bipartite quantum dynamics
论文作者
论文摘要
以高精度来表征哈密顿量的能力对于实施量子技术至关重要。除了利用最佳探针态和最佳测量的发达方法外，最佳控制方法还可用于识别应用于系统的时间依赖性脉冲，以在估计汉密尔顿参数的估计中获得更高的精度，尤其是在存在噪声的情况下。在这里，我们将单个量子位的最佳控制估计方案扩展到非交互动力学以及两个相互作用的量子位，从而证明了最大精度，时间稳定性以及对未受控制的协议的鲁棒性。
The ability to characterise a Hamiltonian with high precision is crucial for the implementation of quantum technologies. In addition to the well-developed approaches utilising optimal probe states and optimal measurements, the method of optimal control can be used to identify time-dependent pulses applied to the system to achieve higher precision in the estimation of Hamiltonian parameters, especially in the presence of noise. Here, we extend optimally controlled estimation schemes for single qubits to non-commuting dynamics as well as two interacting qubits, demonstrating improvements in terms of maximal precision, time-stability, as well as robustness over uncontrolled protocols.
