arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.01601quant-ph
收藏

量子发射体一般空间形变的量子费舍尔信息

Quantum Fisher information for general spatial deformations of quantum emitters

Jasminder S. Sidhu, Pieter Kok

摘要:

我们提出了一个框架,用于检测和估计的变形施加到网格的源。我们的形式主义使用的量子费舍尔信息矩阵(\textsc{qfim})的哈密顿公式作为品质因数,以量化的信息量,我们对变形矩阵。网格变形的量子精密测量提供了一个理想的测试平台,以检查任意参数化的信道演变与一般非交换厄米特发电机的多参数估计。我们将变形参数的平移的本地生成器推广到多参数估计,并使用它来探索如何检测和校正不同的变形。这种方法适用于任何变形。我们探讨我们的理论的应用,仿射几何映射集。网格的配置和源的属性都有助于使\textsc{qfim}对变形参数变化的灵敏度最大化。对于非乘法哈密顿参数化网格旋转所产生的任何选定的轴,振荡依赖的\textsc{qfi}表面之间的相互源分离距离和网格配置的特定相互作用。

英文摘要:

We present a framework for the detection and estimation of deformations applied to a grid of sources. Our formalism uses the Hamiltonian formulation of the quantum Fisher information matrix (\textsc{qfim}) as the figure of merit to quantify the amount of information we have on the deformation matrix. Quantum metrology for grid deformations provides an ideal testbed to examine multi-parameter estimations for arbitrarily parameterised channel evolutions with generally non-commuting Hermitian generators. We generalise the local generator of translations for deformation parameters to multi-parameter estimations and use it to explore how well different deformations can be detected and corrected for. This approach holds for any deformation. We explore the application of our theory to the set of affine geometry maps. Both the configuration of the grid and the properties of the sources help to maximise the sensitivity of the \textsc{qfim} to changes in the deformation parameters. For the non-multiplicative Hamiltonian parameterisations resulting from grid rotations about any chosen axis, oscillatory dependence of the \textsc{qfi} surfaces for a specific interplay between mutual source separation distances and grid configurations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑