论文标题
光子拓扑绝缘子中的两光子边缘状态：拓扑保护与纠缠程度
Two-photon edge states in photonic topological insulators: topological protection versus degree of entanglement
论文作者
论文摘要
拓扑绝缘子将散装中的绝缘特性与沿边缘的无散射运输结合在一起，即使在存在缺陷和混乱的情况下，也支持耗散的单向单向能量和信息流。使用光子工具进行工程量子汉密尔顿人的可行性，再加上纠缠光子的可用性，这增加了在光学量子计算和信息处理中采用拓扑保护的纠缠状态的有趣可能性。但是，尽管两次拓扑受保护的单光子状态的产物建立了两光子状态，从而完全保护了其单光子“父母”，但高度的不可分割性可能会导致通过疾病传播后两光子状态的迅速恶化。我们确定物理机制在拓扑光子晶格中有助于纠缠状态的脆弱性，并提出明确的指南，以最大程度地提高纠缠而无需牺牲拓扑保护。
Topological insulators combine insulating properties in the bulk with scattering-free transport along edges, supporting dissipationless unidirectional energy and information flow even in the presence of defects and disorder. The feasibility of engineering quantum Hamiltonians with photonic tools, combined with the availability of entangled photons, raises the intriguing possibility of employing topologically protected entangled states in optical quantum computing and information processing. However, while two-photon states built as a product of two topologically protected single-photon states inherit full protection from their single-photon "parents", high degree of non-separability may lead to rapid deterioration of the two-photon states after propagation through disorder. We identify physical mechanisms which contribute to the vulnerability of entangled states in topological photonic lattices and present clear guidelines for maximizing entanglement without sacrificing topological protection.
