Entanglement represents "the" key resource for several applications of quantum information processing, ranging from quantum communications to distributed quantum computing. Despite its fundamental importance, deterministic generation of maximally entangled qubits represents an on-going open problem. Here, we design a novel generation scheme exhibiting two attractive features, namely, i) deterministically generating genuinely multipartite entangled states, ii) without requiring any direct interaction between the qubits. Indeed, the only necessary condition is the possibility of coherently controlling -- according to the indefinite causal order framework -- the causal order among some unitaries acting on the qubits. Through the paper, we analyze and derive the conditions on the unitaries for deterministic generation, and we provide examples for unitaries practical implementation. We conclude the paper by discussing the scalability of the proposed scheme to higher dimensional GME states and by introducing some possible applications of the proposal for quantum networks.
翻译:缠绕是量子信息处理的若干应用的“ ” 关键资源, 从量子通信到分布式量子计算。 尽管它具有根本重要性, 决定性地生成了最大缠结的 ⁇ 是一个长期的开放问题。 在这里, 我们设计了一个新型的一代计划, 展示了两个有吸引力的特征, 即, (一) 决定性地产生真正多面缠绕的状态, (二) 不需要量子之间的直接互动。 事实上, 唯一必要的条件是, 根据无限的因果秩序框架, 有可能一致控制一些按量子行事的单位之间的因果关系。 我们通过该文件分析并推导出关于确定性一代的单位的条件, 我们为单位的实际实施提供范例。 我们通过讨论拟议计划在更高维度的GME州之间的可扩展性, 并引入量子网络建议的一些可能的应用来完成该文件的结尾。