Wang Kai, Ding Dong-Sheng, Zhang Wei, He Qiong-Yi, Guo Guang-Can, Shi Bao-Sen
Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China; School of Instrument Science and Opto-Electronics Engineering, Beihang University, Beijing 100191, China; Hefei Innovation Research Institute, Beihang University, Heifei 230013, China.
Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China; Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China; Wang Da-Heng Collaborative Innovation Center for Science of Quantum Manipulation and Control, Heilongjiang Province and Harbin University of Science and Technology, Harbin 150080, China.
Sci Bull (Beijing). 2020 Feb 26;65(4):280-285. doi: 10.1016/j.scib.2019.11.011. Epub 2019 Nov 14.
Einstein-Podolsky-Rosen (EPR) entanglement involving a pair of particles entangled in their positions and momenta is of special interest in the field of quantum information. Previously, EPR entanglement has been studied in different physical systems but in fixed coordinate spaces. Here, we demonstrate an experiment of ghost imaging and ghost interference in rotated position-momentum spaces by using position-momentum entangled photons generated from a hot atomic ensemble. By using different image objects, the measured position-momentum correlations exhibit intriguing dynamics, including gradual decrease and axis-independent EPR entanglement. The reported results on manipulating the EPR entanglement in rotating coordinate spaces hold promise in quantum communication and distant quantum image processing.
涉及一对在位置和动量上纠缠的粒子的爱因斯坦-波多尔斯基-罗森（EPR）纠缠在量子信息领域具有特殊意义。此前，EPR纠缠已在不同物理系统中进行了研究，但都是在固定坐标空间中。在此，我们展示了一个通过使用热原子系综产生的位置-动量纠缠光子，在旋转的位置-动量空间中进行鬼成像和鬼干涉的实验。通过使用不同的图像物体，所测量的位置-动量相关性呈现出有趣的动态变化，包括逐渐减小和与轴无关的EPR纠缠。所报道的关于在旋转坐标空间中操纵EPR纠缠的结果在量子通信和远程量子图像处理方面具有前景。
