论文标题
量子LOSR网络无法生成具有高保真度的图形状态
Quantum LOSR networks cannot generate graph states with high fidelity
论文作者
论文摘要
量子网络导致了新的局部和相关性概念，一个重要的问题涉及以下问题，该问题可以通过给定的网络结构和设备实验制备哪些量子状态，哪些量子可以制定。我们证明，只要不可用馈电和量子记忆，就无法源于具有两分源的任何量子网络，因此无法源于任何量子网络。此外，多量表状态和任何网络状态的保真度都不能超过$ 9/10 $。也可以为大型多Qudit图状态建立类似的结果。
Quantum networks lead to novel notions of locality and correlations and an important problem concerns the question of which quantum states can be experimentally prepared with a given network structure and devices and which not. We prove that all multi-qubit graph states arising from a connected graph cannot originate from any quantum network with bipartite sources, as long as feed-forward and quantum memories are not available. Moreover, the fidelity of a multi-qubit graph state and any network state cannot exceed $9/10$. Similar results can also be established for a large class of multi-qudit graph states.
