期刊
PHYSICAL REVIEW LETTERS
卷 107, 期 27, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.270402
关键词
-
资金
- Singapore National Research Foundation under NRF [NRF-NRFF2011-07]
- NSF [PHY-0903953, PHY-1005540]
- ONR [N00014-11-1-0082]
- Direct For Mathematical & Physical Scien
- Division Of Physics [0903953] Funding Source: National Science Foundation
In astronomy, interferometry of light collected by separate telescopes is often performed by physically bringing the optical paths together in the form of Young's double-slit experiment. Optical loss severely limits the efficiency of this so-called direct detection method, motivating the fundamental question of whether one can achieve a comparable performance using separate optical measurements at the two telescopes before combining the measurement results. Using quantum mechanics and estimation theory, here I show that any such spatially local measurement scheme, such as heterodyne detection, is fundamentally inferior to coherently nonlocal measurements, such as direct detection, for estimating the mutual coherence of bipartite thermal light when the average photon flux is low. This surprising result reveals an overlooked signature of quantum nonlocality in a classic optics experiment.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据