l 00 l entanglement and the twisted quantum eraser
l 00 l entanglement and the twisted quantum eraser
复制标题
l 00 l 纠缠与扭曲的量子橡皮擦
DOI：
10.1116/5.0167938
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Danese D
中科院分区：
文献类型：
--
作者：
Danese D
我们展示了在拉盖尔-高斯（LG）横空间自由度中产生的不平衡双光子纠缠，其中一个光子携带基本（高斯）模式，另一个光子携带具有非零方位（）或径向（）分量的高阶LG模式。根据状态命名法，我们称这些类型的状态为纠缠态。它们是通过移动LG模式空间中的一个光子，并在分束器中将其与第二个（最初不相关的）光子结合，然后进行巧合检测而产生的。为了验证双光子相干性，我们展示了一个双光子“扭曲”量子擦除器，其中Hong-Ou-Mandel干涉通过将两个可区分的光子投射到旋转的LG叠加基中来恢复。使用纠缠见证，我们发现我们生成的状态对各自的理想最大纠缠态的保真度分别为95.31%和89.80%。除了具有基本的兴趣之外，这种类型的纠缠可能会对普通量子物理学家的笑料产生重大影响。
We demonstrate the generation of unbalanced two-photon entanglement in the Laguerre-Gaussian (LG) transverse-spatial degree-of-freedom, where one photon carries a fundamental (Gauss) mode and the other a higher-order LG mode with a non-zero azimuthal () or radial () component. Taking a cue from thestate nomenclature, we call these types of states-entangled. They are generated by shifting one photon in the LG mode space and combining it with a second (initially uncorrelated) photon at a beamsplitter, followed by coincidence detection. In order to verify two-photon coherence, we demonstrate a two-photon ``twisted'' quantum eraser, where Hong-Ou-Mandel interference is recovered between two distinguishable photons by projecting them into a rotated LG superposition basis. Using an entanglement witness, we find that our generated states have fidelities of 95.31\% and 89.80\% to their respective ideal maximally entangled states. Besides being of fundamental interest, this type of entanglement will likely have a significant impact on tickling the average quantum physicist's funny bone.