School of Physics and Material Science, Anhui University, Hefei 230601, P. R. China.
Sci Rep. 2017 Feb 1;7:38456. doi: 10.1038/srep38456.
In this work, the quantum fisher information (QFI) and Bell non-locality of a multipartite fermionic system are investigated. Unlike the currently existing research of QFI, we focus our attention on the differences between quantum fisher information and Bell non-locality under the relativistic framework. The results show that although the relativistic motion affects the strength of the non-locality, it does not change the physical structure of non-locality. However, unlike the case of non-locality, the relativistic motion not only influence the precision of the QFI F but also broke the symmetry of the function F. The results also show that for a special multipartite system, , the number of particles of a initial state do not affect the F. Furthermore, we also find that F is completely unaffected in non-inertial frame if there are inertial observers. Finally, in view of the decay behavior of QFI and non-locality under the non-inertial frame, we proposed a effective scheme to battle against Unruh effect.
在这项工作中，我们研究了多粒子费米子系统的量子 Fisher 信息（QFI）和贝尔非局域性。与当前 QFI 的研究不同，我们关注的是在相对论框架下量子 Fisher 信息和贝尔非局域性之间的差异。结果表明，尽管相对论运动影响非局域性的强度，但它不会改变非局域性的物理结构。然而，与非局域性的情况不同，相对论运动不仅影响 QFI F 的精度，还打破了函数 F 的对称性。结果还表明，对于一个特殊的多粒子系统，当粒子数为 2 时，初始状态的粒子数不会影响 F。此外，我们还发现，如果存在惯性观测者，那么在非惯性系中，F 不会受到任何影响。最后，鉴于非惯性系下 QFI 和非局域性的衰减行为，我们提出了一种有效方案来对抗 Unruh 效应。
