Kim Yong-Su, Kwon Osung, Lee Sang Min, Lee Jong-Chan, Kim Heonoh, Choi Sang-Kyung, Park Hee Su, Kim Yoon-Ho
Department of Physics, Pohang University of Science and Technology, Pohang,South Korea.
Opt Express. 2011 Dec 5;19(25):24957-66. doi: 10.1364/OE.19.024957.
Spatial interference of quantum mechanical particles exhibits a fundamental feature of quantum mechanics. A two-mode entangled state of N particles known as N00N state can give rise to non-classical interference. We report the first experimental observation of a three-photon N00N state exhibiting Young's double-slit type spatial quantum interference. Compared to a single-photon state, the three-photon entangled state generates interference fringes that are three times denser. Moreover, its interference visibility of 0.49 ± 0.09 is well above the limit of 0.1 for spatial super-resolution of classical origin.
量子力学粒子的空间干涉展现了量子力学的一个基本特征。一种被称为N00N态的N粒子双模纠缠态能够产生非经典干涉。我们首次通过实验观测到了呈现杨氏双缝型空间量子干涉的三光子N00N态。与单光子态相比，三光子纠缠态产生的干涉条纹密度提高了两倍。此外，其0.49±0.09的干涉可见度远高于经典起源空间超分辨率的0.1的极限。
