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首页> 外文期刊>Physical Review, A. Atomic, molecular, and optical physics >Hybrid quantum repeater protocol with fast local processing
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Hybrid quantum repeater protocol with fast local processing

机译:具有快速本地处理功能的混合量子中继器协议

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We propose a hybrid quantum repeater protocol combining the advantages of continuous and discrete variables. The repeater is based on the previous work of Brask but we present two ways of improving this protocol. In the previous protocol entangled single-photon states are produced and grown into superpositions of coherent states, known as two-mode cat states. The entanglement is then distributed using homodyne detection. To improve the protocol, we replace the time-consuming nonlocal growth of cat states with local growth of single-mode cat states, eliminating the need for classical communication during growth. Entanglement is generated in subsequent connection processes. Furthermore the growth procedure is optimized. We review the main elements of the original protocol and present the two modifications. Finally the two protocols are compared and the modified protocol is shown to perform significantly better than the original protocol.
机译:我们提出了一种混合量子中继器协议,该协议结合了连续变量和离散变量的优点。该转发器基于Brask的先前工作,但是我们提出了两种改进此协议的方法。在先前的协议中,产生了纠缠的单光子状态,并使其生长成相干态的叠加,这被称为双模猫态。然后使用零差检测来分配纠缠。为了改进协议,我们用单模猫状态的本地增长替换了耗时的猫状态的非本地增长,从而消除了增长过程中对经典通信的需求。缠结在随后的连接过程中生成。此外,优化了生长过程。我们回顾了原始协议的主要内容,并提出了两个修改。最后,将这两种协议进行比较,并显示修改后的协议的性能明显优于原始协议。

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