Hanbury Brown and Twiss interferometry with interacting photons
Hanbury Brown and Twiss interferometry with interacting photons
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DOI：
10.1038/nphoton.2010.195
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发表时间：
2010-10-01
期刊：
影响因子：
35
通讯作者：
Silberberg, Y.
中科院分区：
文献类型：
--
作者：
Bromberg, Y.;Lahini, Y.;Silberberg, Y.
五十年前，汉伯里·布朗和特维斯(HBT)证明，通过将两个探测器在两个不同位置测量的强度波动进行关联，可以测量恒星的角大小。从那时起，非局域相关测量在物理学的许多领域变得无处不在，也被应用到电子、物质波和亚原子粒子上，而不仅仅是光子。HBT干涉计量学中的一个重要假设是，粒子在从源到探测器的途中不会相互作用。然而，这一假设并不总是有效的。在这里，我们通过考虑光场在诱导光子间相互作用的非线性介质中的传播来研究相互作用对HBT干涉测量的影响。我们发现相互作用会影响多径干扰，从而限制了提取信号源信息的能力。然而，我们发现，即使在存在相互作用的情况下，对强度涨落的适当分析也可以恢复源的大小。
Five decades ago, Hanbury Brown and Twiss (HBT) demonstrated that the angular size of stars can be measured by correlating the intensity fluctuations measured by two detectors at two different locations. Since then, non-local correlation measurements have become ubiquitous in many areas of physics and have also been applied, beyond photons, to electrons, matter waves and subatomic particles. An important assumption in HBT interferometry is that the particles do not interact on their way from the source to the detectors. However, this assumption is not always valid. Here, we study the effects of interactions on HBT interferometry by considering the propagation of light fields in a nonlinear medium that induces interactions between the photons. We show that interactions affect multipath interference, limiting the ability to extract information on the source. Nevertheless, we find that proper analysis of the intensity fluctuations can recover the size of the source, even in the presence of interactions.