Quantum computing holds a great promise and this work proposes to use new quantum data networks (QDNs) to connect multiple small quantum computers to form a cluster. Such a QDN differs from existing QKD networks in that the former must deliver data qubits reliably within itself. Two types of QDNs are studied, one using teleportation and the other using tell-and-go (TAG) to exchange quantum data. Two corresponding quantum transport protocols (QTPs), named Tele-QTP and TAG-QTP, are proposed to address many unique design challenges involved in reliable delivery of data qubits, and constraints imposed by quantum physics laws such as the no-cloning theorem, and limited availability of quantum memory. The proposed Tele-QTP and TAG-QTP are the first transport layer protocols for QDNs, complementing other works on the network protocol stack. Tele-QTP and TAG-QTP have novel mechanisms to support congestion-free and reliable delivery of streams of data qubits by managing the limited quantum memory at end hosts as well as intermediate nodes. Both analysis and extensive simulations show that the proposed QTPs can achieve a high throughput and fairness. This study also offers new insights into potential tradeoffs involved in using the two methods, teleportation and TAG, in two types of QDNs.
翻译:量子计算很有希望,这项工作提议使用新的量子数据网络(QDNs)连接多个小量子计算机组成一个集群。这种QDN与现有的QKD网络不同,因为前者必须可靠地提供数据qubits。研究的有两种QDN,一种是使用传送,另一种是使用“TAG”交换量子数据。两个相应的量子传输协议(QTPs)名为Tele-QTP和TAG-QTP,旨在应对可靠提供数据quits(QDNs)所涉及的许多独特的设计挑战,以及量子物理法(如无二次标语和数量存储有限)带来的限制。拟议的Te-QTP和TAG-QTP是QNs的第一个运输层协议,补充网络协议堆中的其他工作。TeleQTP和TAG-QTP有新的机制支持数据流的无拥堵和可靠交付,通过管理有限的量子存储终端存储器管理有限的量级存储台的量存储台,以及作为中间见解,同时展示了两种潜在的交易方式。