Hanbury Brown and Twiss measurements in curved space
Hanbury Brown and Twiss measurements in curved space
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DOI：
10.1038/nphoton.2015.244
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发表时间：
2015-12
期刊：
影响因子：
35
通讯作者：
Vincent H. Schultheiss;S. Batz;U. Peschel
中科院分区：
文献类型：
--
作者：
Vincent H. Schultheiss;S. Batz;U. Peschel
当汉伯里·布朗和特威斯 (HBT) 提出强度相关测量技术来检查可见光范围内恒星的角大小时，他们挑战了量子力学的常见概念，并引发了一场导致量子光学建立的讨论。在这封信中，我们重新审视这一基本技术并研究其在存在空间曲率的情况下的影响。为此，我们从理论上和实验上研究了沿着恒定正负高斯曲率的二维表面传播的散斑图案的演化，违背了光在自由空间传播期间总是获得空间相干性的概念。我们还从居民的角度讨论了利用 HBT 遍历空间曲率的可测量性。通过其对称性，具有恒定高斯曲率的表面可以充当具有非零宇宙学常数的宇宙的模拟模型。
When Hanbury Brown and Twiss (HBT) proposed their technique of intensity correlation measurements,,to examine the angular size of stars in the visible range, they challenged the common conception of quantum mechanics and kicked off a discussion that led to the establishment of quantum optics,,. In this Letter we revisit this fundamental technique and study its implications in the presence of space curvature. To this end we theoretically and experimentally investigate the evolution of speckle patterns propagating along two-dimensional surfaces of constant positive and negative Gaussian curvature, defying the notion that light always gains spatial coherence during free-space propagation. We also discuss the measurability of the traversed space's curvature utilizing HBT from an inhabitant's point of view. Through their symmetry, surfaces with constant Gaussian curvature act as analogue models for universes possessing non-vanishing cosmological constants.