Three-photon energy–time entanglement
Three-photon energy–time entanglement
复制标题
DOI：
10.1038/nphys2492
复制
发表时间：
2012-03
期刊：
影响因子：
19.6
通讯作者：
L. Shalm;D. Hamel;Zhizhong Yan;C. Simon;K. Resch;T. Jennewein
中科院分区：
文献类型：
--
作者：
L. Shalm;D. Hamel;Zhizhong Yan;C. Simon;K. Resch;T. Jennewein
纠缠的量子粒子具有比经典物理学所允许的更强的相关性。这些相关性是量子力学中深层基础问题的核心，并构成了许多新兴量子技术的基础。虽然已经纠缠了多达14个离子的离散变量和三个强光束之间的连续变量，但纠缠三个或更多个单个粒子的连续属性仍然是一个开放的挑战。在这里，我们实验证明了真正的三方连续变量纠缠三个分离的粒子之间。在我们的设置中，这三个粒子是由单个输入光子直接创建的光子;创建过程导致光子的能量和发射时间之间的量子相关性。我们的光子之间的纠缠是连续变量的Einstein-Podolsky-罗森关联的三方推广，并且可以作为各种量子信息任务的宝贵资源。
Entangled quantum particles have correlations stronger than those allowed by classical physics. These correlations are at the heart of deep foundational questions in quantum mechanics,,, and form the basis of many emerging quantum technologies,,,,,. Although the discrete variables of up to 14 ions and the continuous variables between three intense optical beams,have been entangled, it has remained an open challenge to entangle the continuous properties of three or more individual particles. Here we experimentally demonstrate genuine tripartite continuous-variable entanglement between three separated particles. In our set-up the three particles are photons created directly from a single input photon; the creation process leads to quantum correlations between the energies and emission times of the photons. The entanglement between our photons is the three-party generalization of the Einstein–Podolsky–Rosen correlations for continuous variables, and could serve as a valuable resource in a wide variety of quantum information tasks.