论文标题
由串扰影响的空间反复运动的应用范围用于解决不平衡来源之间的分离
Application range of crosstalk-affected spatial demultiplexing for resolving separations between unbalanced sources
论文作者
论文摘要
超分辨率是当代量子光学和计量学十字路口的关键问题之一。最近，已经表明，对于两个平衡来源的理想化情况，即使在存在测量串扰的情况下，空间模式消除（Spade）也比直接成像更好地分辨率[Phys。莱特牧师。 125，100501（2020）]。在这项工作中，我们考虑了任意不平衡的来源，并对串扰对从黑桃获得的分辨率的影响进行系统分析。在这种广义的情况下，我们剖析了Spade的有效性在非试图取决于串扰，相对亮度和来源之间的分离的强度。特别是，对于任何来源不平衡，在消失的源分离的渐近极限中，黑桃的表现都比理想的直接成像差。尽管如此，对于串扰强度的现实值，黑桃仍然是几个数量级分离级数的优越方法。
Superresolution is one of the key issues at the crossroads of contemporary quantum optics and metrology. Recently, it was shown that for an idealized case of two balanced sources, spatial mode demultiplexing (SPADE) achieves resolution better than direct imaging even in the presence of measurement crosstalk [Phys. Rev. Lett. 125, 100501 (2020)]. In this work, we consider arbitrarily unbalanced sources and provide a systematic analysis of the impact of crosstalk on the resolution obtained from SPADE. As we dissect, in this generalized scenario, SPADE's effectiveness depends non-trivially on the strength of crosstalk, relative brightness and the separation between the sources. In particular, for any source imbalance, SPADE performs worse than ideal direct imaging in the asymptotic limit of vanishing source separations. Nonetheless, for realistic values of crosstalk strength, SPADE is still the superior method for several orders of magnitude of source separations.
