论文标题
三模式的三模式自发参数下调中的三方真实非高斯纠缠
Tripartite Genuine Non-Gaussian Entanglement in Three-Mode Spontaneous Parametric Downconversion
论文作者
论文摘要
我们表明，由三模式自发参数下调（SPDC）相互作用产生的状态Hamiltonian具有三方纠缠与其他范式三模式纠缠的三模式纠缠的三模式缠结状态，该状态由两种模式SPDC相互作用的组合产生。虽然两种模式SPDC生成的高斯状态，其纠缠的特征是基于两种模式量子相关性的标准标准，但这些标准无法捕获由三模式SPDC产生的纠缠。我们使用由三模式相关函数构建的标准来表明，与最新的文献索赔相反，三模式SPDC的超导电路实现中产生的一类状态类别具有三方纠缠。这些标准适用于三重SPDC，但我们表明它们未能检测到已知拥有它的其他州的三方纠缠，这说明了在三模式连续变量系统中存在两个根本不同的三方纠缠概念。
We show that the states generated by a three-mode spontaneous parametric downconversion (SPDC) interaction Hamiltonian possess tripartite entanglement of a different nature to other paradigmatic three-mode entangled states generated by the combination of two-mode SPDCs interactions. While two-mode SPDC generates gaussian states whose entanglement can be characterized by standard criteria based on two-mode quantum correlations, these criteria fail to capture the entanglement generated by three-mode SPDC. We use criteria built from three-mode correlation functions to show that the class of states recently generated in a superconducting-circuit implementation of three-mode SPDC ideally have tripartite entanglement, contrary to recent claims in the literature. These criteria are suitable for triple SPDC but we show that they fail to detect tripartite entanglement in other states which are known to possess it, which illustrates the existence of two fundamentally different notions of tripartite entanglement in three-mode continuous variable systems.
