arXiv 1204.67012012-04-30quant-ph

高信号区的弱干扰

Weak interference in the high-signal regime

Juan P. Torres, Graciana Puentes, Nathaniel Hermosa, Luis Jose Salazar-Serrano

备注：: 7 pages
发表信息：: Optics Express, Vol. 20, Issue 17, pp. 18869-18875 (2012)
DOI：: 10.1364/OE.20.018869

摘要：

弱放大是一种信号增强技术，用于测量由于技术限制而无法确定的微小变化。它是基于一种特殊类型的相互作用的存在，这种相互作用耦合了系统的一个属性，即，偏振或哪个路径信息，具有单独的自由度，即，横向位置或频率。不幸的是，弱放大过程通常伴随着检测信号的严重损失，这限制了弱放大概念的适用性。然而，我们将在这里展示，由于弱测量概念本质上是一种干扰现象，因此应该可以使用干扰的程度来获得关于在更一般的情况下研究的物理系统的相关信息，其中信号没有严重耗尽（高信号状态）。这可以扩大可以应用弱测量概念的系统的范围。在这种情况下，通常可以称为弱干扰，弱值的想法不传达任何有用的信息。

英文摘要：

Weak amplification is a signal enhancement technique which is used to measure tiny changes that otherwise cannot be determined because of technical limitations. It is based on the existence of a special type of interaction which couples a property of a system, i.e., polarization or which-path information, with a separate degree of freedom, i.e., transverse position or frequency. Unfortunately, the weak amplification process is generally accompanied by severe losses of the detected signal, which limits the applicability of the weak amplification concept. However, we will show here that since the weak measurement concept is essentially an interference phenomena, it should be possible to use the degree of interference to get relevant information about the physical system under study in a more general scenario, where the signal is not severely depleted (high-signal regime). This can widen the range of systems where the weak measurement concept can be applied. In this scenario, which can be called generally weak interference, the idea of weak value does not convey any useful information.

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。

摘要：

英文摘要：

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