量子网络中纠缠产生开关控制体系

Scarlett Gauthier;Gayane Vardoyan;Stephanie Wehner
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引用次数: 0

摘要

量子网络节点之间的纠缠通常是使用中间设备(如预告站)作为资源产生的。当将量子网络扩展到多个节点时,每对节点都需要一个专用的中间设备,这会带来很高的成本。在这里,我们提出了一种经济有效的架构,通过称为纠缠生成交换机(EGS)的中央量子网络集线器连接许多量子网络节点。通过共享纠缠所需的资源,EGS允许以固定的资源成本连接多个量子节点。我们提出了一种称为速率控制协议的算法,它调节了用户集之间对集线器资源访问的竞争水平。我们进一步证明了该算法产生的速率的收敛定理。我们在网络效用最大化的框架下,利用拉格朗日乘子和拉格朗日对偶理论来推导算法。我们的EGS架构为开发与其他类型的量子网络集线器以及更复杂的系统模型兼容的控制架构奠定了基础。
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An Architecture for Control of Entanglement Generation Switches in Quantum Networks
Entanglement between quantum network nodes is often produced using intermediary devices—such as heralding stations—as a resource. When scaling quantum networks to many nodes, requiring a dedicated intermediary device for every pair of nodes introduces high costs. Here, we propose a cost-effective architecture to connect many quantum network nodes via a central quantum network hub called an entanglement generation switch (EGS). The EGS allows multiple quantum nodes to be connected at a fixed resource cost, by sharing the resources needed to make entanglement. We propose an algorithm called the rate control protocol, which moderates the level of competition for access to the hub's resources between sets of users. We proceed to prove a convergence theorem for rates yielded by the algorithm. To derive the algorithm we work in the framework of network utility maximization and make use of the theory of Lagrange multipliers and Lagrangian duality. Our EGS architecture lays the groundwork for developing control architectures compatible with other types of quantum network hubs as well as system models of greater complexity.
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