Weak-value amplification and the lifetime of a decaying particle
Weak-value amplification and the lifetime of a decaying particle
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DOI：
10.1103/physreva.104.032202
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发表时间：
2021-05
影响因子：
2.9
通讯作者：
Yuichiro Mori;I. Tsutsui
中科院分区：
文献类型：
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作者：
Yuichiro Mori;I. Tsutsui
我们研究基于弱值放大技术改变衰变粒子的测量寿命的可能性，其中执行称为后选择的附加过滤过程。我们在本文提出的直接测量方案中进行的分析表明，对于简单的两能级系统，寿命可以比原始系统延长三倍以上，同时也可以通过适当选择后选择来任意缩短寿命。这一结果与我们之前对实验室中可能观察到的 B 介子寿命可能延长的分析一致，并表明弱值放大在传统上考虑的精密测量之外的新应用还有空间。
We study the possibility of varying the measured lifetime of a decaying particle based on the technique of weak value amplification in which an additional filtering process called postselection is performed. Our analysis made in a direct measurement scheme presented here shows that, for simple two-level systems, the lifetime may be prolonged more than three times compared to the original one, while it can also be shortened arbitrarily by a proper choice of postselection. This result is consistent with our previous analysis on the possible prolongation of the lifetime of B mesons that may be observed in laboratories, and suggests room for novel applications of weak value amplification beyond precision measurement conventionally considered.