Boyer Vincent, Marino Alberto M, Pooser Raphael C, Lett Paul D
Joint Quantum Institute, National Institute of Standards and Technology, University of Maryland, Gaithersburg, MD 20899, USA.
Chemphyschem. 2009 Mar 23;10(5):755-60. doi: 10.1002/cphc.200800734.
The entanglement properties of two beams of light can reside in subtle correlations that exist in the unavoidable quantum fluctuations of their amplitudes and phases. Recent advances in the generation of nonclassical light with four-wave mixing in an atomic vapor have permitted the production and the observation of entanglement that is localized in almost arbitrary transverse regions of a pair of beams. These multi-spatial-mode entangled beams may prove useful for an array of applications ranging from noise-free imaging and improved position sensing to quantum information processing.
两束光的纠缠特性可能存在于其幅度和相位不可避免的量子涨落中存在的微妙关联里。利用原子蒸汽中的四波混频产生非经典光的最新进展，已实现了一对光束中几乎任意横向区域内局域化纠缠的产生与观测。这些多空间模式纠缠光束可能在一系列应用中证明是有用的，从无噪声成像、改进的位置传感到量子信息处理。
