表面码量子通信
Surface code quantum communication
摘要：
量子通信通常涉及中继站的线性链，每个中继站都能够进行可靠的本地量子计算，并通过不可靠的通信链路连接到最近的邻居。现有协议采用双向经典通信方式，通信速率较低。我们表明，如果贝尔对相邻的站之间产生的成功的概率大于0.65和保真度大于0.96，双向经典通信可以完全避免和量子信息可以发送到任意的距离与任意低的错误率仅限于本地门速度。每个中继器的量子比特数与通信距离成比例关系。如果预告成功的概率小于0.65，并且仅每T_B秒产生保真度不小于0.92的相邻站之间的贝尔对，则对数资源缩放保持不变，并且通过N条链路的通信速率与1/（T_B log^2 N）成比例。
英文摘要：
Quantum communication typically involves a linear chain of repeater stations, each capable of reliable local quantum computation and connected to their nearest neighbors by unreliable communication links. The communication rate in existing protocols is low as two-way classical communication is used. We show that, if Bell pairs are generated between neighboring stations with a probability of heralded success greater than 0.65 and fidelity greater than 0.96, two-way classical communication can be entirely avoided and quantum information can be sent over arbitrary distances with arbitrarily low error at a rate limited only by the local gate speed. The number of qubits per repeater scales logarithmically with the communication distance. If the probability of heralded success is less than 0.65 and Bell pairs between neighboring stations with fidelity no less than 0.92 are generated only every T_B seconds, the logarithmic resource scaling remains and the communication rate through N links is proportional to 1/(T_B log^2 N).
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
