论文标题
多光子高维分层量子状态的实验创建
Experimental creation of Multi-Photon High-Dimensional Layered Quantum States
论文作者
论文摘要
量子纠缠是量子信息中最重要的资源之一。近年来，对量子纠缠的研究主要集中在纠缠量子的数量增加或两个颗粒的高维纠缠。与Qubit状态相比，多部分高维纠缠状态具有有益的特性，并且对于构建量子网络具有强大的功能。但是，由于难以创建此类状态，几乎没有关于多部分高维量子纠缠的研究。在本文中，我们通过实验准备了多部分高维状态$ |ψ_{442} \ rangle = \ frac {1} {1} {2}（| 000 \ rangle+| 110 \ rangle+| rangle+| 221 \ rangle+| rangle+| 331 \ rangle）$ by phote ot tha Phate of Phate of Phate of Phate Mode a Phote of Phate of Phote Mode y s tha Phate Mode YAGH。我们获得了量子状态的保真度$ f = 0.854 \ pm0.007 $，这证明是一个真正的多部分高维纠缠状态。最后，我们使用此量子状态原理展示了分层的量子网络。我们的工作突出了通往复杂量子网络的另一条途径。
Quantum entanglement is one of the most important resources in quantum information. In recent years, the research of quantum entanglement mainly focused on the increase in the number of entangled qubits or the high-dimensional entanglement of two particles. Compared with qubit states, multipartite high-dimensional entangled states have beneficial properties and are powerful for constructing quantum networks. However, there are few studies on multipartite high-dimensional quantum entanglement due to the difficulty of creating such states. In this paper, we experimentally prepared a multipartite high-dimensional state $|Ψ_{442}\rangle=\frac{1}{2}(|000\rangle+|110\rangle+|221\rangle+|331\rangle)$ by using the path mode of photons. We obtain the fidelity $F=0.854\pm0.007$ of the quantum state, which proves a real multipartite high-dimensional entangled state. Finally, we use this quantum state to demonstrate a layered quantum network in principle. Our work highlights another route towards complex quantum networks.
