论文标题
量化Fisher信息的连贯性
Quantifying coherence in terms of Fisher information
论文作者
论文摘要
在量子计量学中，参数估计精度由量子渔民信息界定。在本文中，我们通过直接考虑选择后的非单身参数化过程来介绍（量子）Fisher信息的一致性措施。这种相干度量通过一致性和参数估计精度之间的确切连接来证明其明显的操作含义。我们还讨论了我们的相干度量与构成单一参数化的量子渔民信息之间的区别。给出了量子状态的分析相干度量。
In quantum metrology, the parameter estimation accuracy is bounded by quantum Fisher information. In this paper, we present coherence measures in terms of (quantum) Fisher information by directly considering the post-selective non-unitary parametrization process. This coherence measure demonstrates the apparent operational meaning by the exact connection between coherence and parameter estimation accuracy. We also discuss the distinction between our coherence measure and the quantum Fisher information subject to unitary parametrization. The analytic coherence measure is given for qubit states.
