Einstein-Podolsky-Rosen paradox with position-momentum entangled macroscopic twin beams
Einstein-Podolsky-Rosen paradox with position-momentum entangled macroscopic twin beams
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DOI：
10.1088/2058-9565/ac1b69
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发表时间：
2021-10-01
影响因子：
6.7
通讯作者：
Marino, Alberto M.
中科院分区：
文献类型：
--
作者：
Kumar, Ashok;Nirala, Gaurav;Marino, Alberto M.
空间纠缠是量子增强成像应用和高维量子信息协议的核心。特别是，对于成像和传感应用，需要提供一个真实的优势，在经典的国家的最先进的量子态与宏观数量的光子。我们证明了爱因斯坦-波多尔斯基-罗森（EPR）悖论在其原来的位置和动量形式与明亮的双光束通过显示EPR空间（位置-动量）纠缠的存在。一个电子倍增电荷耦合器件的相机被用来记录在近场和远场制度的明亮的双光束的图像，以实现一个明显的违反不确定性原则的数量级以上，这仍然是统计上显着的，即使在有限的少量的图像。我们进一步表明，在空间和时间的自由度的量子关联的存在下，导致明亮的孪生光束在近场和远场的空间压缩。这提供了空间纠缠的另一个验证，并指出明亮的孪生光束中存在超纠缠。
Spatial entanglement is at the heart of quantum enhanced imaging applications and high-dimensional quantum information protocols. In particular, for imaging and sensing applications, quantum states with a macroscopic number of photons are needed to provide a real advantage over the classical state-of-the-art. We demonstrate the Einstein-Podolsky-Rosen (EPR) paradox in its original position and momentum form with bright twin beams of light by showing the presence of EPR spatial (position-momentum) entanglement. An electron-multiplying charge-coupled-device camera is used to record images of the bright twin beams in the near and far field regimes to achieve an apparent violation of the uncertainty principle by more than an order of magnitude, which remains statistically significant even in the limit of a small number of images. We further show that the presence of quantum correlations in the spatial and temporal degrees of freedom leads to spatial squeezing of the bright twin beams in both the near and far fields. This provides another verification of the spatial entanglement and points to the presence of hyperentanglement in the bright twin beams.