使用微波光子进行确定性量子状态转移和远程纠
P Kurpiers1, P Magnard2, T Walter2
1Department of Physics, ETH Zürich, Zürich, Switzerland. philipp.kurpiers@phys.ethz.ch.
Nature
|June 15, 2018
概括
我们展示了一个超导量子比特的量子网络协议. 这种方法可以实现高保真状态传输和纠, 这对于分布式量子计算至关重要.
科学领域:
- 量子信息科学
- 量子网络
- 超导量子电路
背景情况:
- 连贯的信息共享对于分布式量子信息处理至关重要.
- 直接量子通道为容错量子计算提供了优势,因为它允许确定性纠.
- 超导电路可以作为通用量子节点进行复杂的量子运算.
研究的目的:
- 在单独的芯片上实现超导量子位之间的确定性状态传输和纠协议.
- 建立一个直接的量子通道以提高纠率和分布式量子计算.
- 展示超导电路在构建强大的量子网络中的潜力.
主要方法:
- 使用全微波腔辅助的拉曼过程.
- 纠的超导量子比特 (转子类型的人造原子) 与移动的单个光子.
- 在接收节点通过光子吸收实现状态转移.
主要成果:
- 在180纳秒内以98.1%的概率和80.02%的准确性证明了量子位状态转移.
- 在50千赫的频率下实现78.9%的远程纠.
- 结果与总方程模拟非常一致.
结论:
- 实施的确定性协议是建立分布式量子计算系统的重要一步.
- 这种方法为量子网络中可靠的信息共享提供了可行的方法.
- 对于未来的量子网络应用来说, 高保真度和纠率是有前途的.
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