论文标题
最佳控制的量子歧视和估计
Optimally controlled quantum discrimination and estimation
论文作者
论文摘要
量子区分和估计是许多量子技术的关键，它们的性能取决于探针状态和测量的最佳选择。在这里，我们表明，可以通过适当地定制构成干涉仪的脉冲来进一步提高它们的性能。开发一个最佳控制框架，并将其应用于噪声存在下磁场的歧视和估计，我们发现总体可实现的状态可区分性有所增加。此外，最大可区分性可以稳定在比折叠时间长的时间大于数量级的时间。
Quantum discrimination and estimation are pivotal for many quantum technologies, and their performance depends on the optimal choice of probe state and measurement. Here we show that their performance can be further improved by suitably tailoring the pulses that make up the interferometer. Developing an optimal control framework and applying it to the discrimination and estimation of a magnetic field in the presence of noise, we find an increase in the overall achievable state distinguishability. Moreover, the maximum distinguishability can be stabilized for times that are more than an order of magnitude longer than the decoherence time.
