论文标题
片上多光子纠缠状态按路径身份
On-Chip Multiphoton Entangled States by Path Identity
论文作者
论文摘要
作为量子资源，多光子纠缠在线性光学量子信息处理中起着至关重要的作用。 Krenn等。 （Phys。Rev.Lett。118，080401 2017）提出了一种创新的方案，该方案是通过路径身份产生纠缠的，其中两光子干扰（称为Hong-ou-Mandel效应）在实验中无需进行。但是，该方案中的实验对稳定性和可伸缩性有严格的要求，这很难在批量光学中实现。为了解决这个问题，在本文中，我们首先提出了一种片上的方案，以产生多光子极化纠缠状态，包括格林伯格·霍恩格林格（GHZ）状态和W状态。此外，我们还通过理论中的路径身份呈现W状态（奇数数字）的一类广义图。片上方案可以在现有的集成光学技术中实施，这对于量子通信网络中的多方纠缠分布有意义。
Multiphoton entanglement, as a quantum resource, plays an essential role in linear optical quantum information processing. Krenn et al. (Phys. Rev. Lett. 118, 080401 2017) proposed an innovative scheme that generating entanglement by path identity, in which two-photon interference (called Hong-Ou-Mandel effect) is not necessary in experiment. However, the experiments in this scheme have strict requirements in stability and scalability, which is difficult to be realized in bulk optics. To solve this problem, in this paper we first propose an on-chip scheme to generate multi-photon polarization entangled states, including Greenberger-Horne-Zeilinger (GHZ) states and W states. Moreover, we also present a class of generalized graphs for W states (odd-number-photon) by path identity in theory. The on-chip scheme can be implemented in existing integrated optical technology which is meaningful for multi-party entanglement distribution in quantum communication networks.
