声子介导的量子状态转移和远程量子位纠
A Bienfait1, K J Satzinger2,1, Y P Zhong1
1Institute for Molecular Engineering, University of Chicago, Chicago, IL 60637, USA.
Science (New York, N.Y.)
|April 27, 2019
概括
科学家使用表面声波声子纠超导量子位, 实现量子贝尔对的84%. 这表明声子是固态系统的可行量子通信通道.
科学领域:
- 量子物理学
- 固态量子系统
- 声学量子通信
背景情况:
- 声子,特别是表面声波 (SAW) 声子,被建议用于遥远的固态量子系统的连接.
- 超导量子比特可以控制和检测单个声子,从而生成和测量复杂的声子状态.
研究的目的:
- 通过确定性发射和捕获流动的SAW声子.
- 让两个超导量子比特使用声子作为通讯道.
主要方法:
- 使用2毫米的声学量子通信通道 (500纳秒延迟线).
- 通过超导量子位进行声子发射和再捕获.
- 实现了量子状态转移和纠生成的部分声子转移.
主要成果:
- 在两个超导量子位之间实现了量子状态转移, 效率为67%.
- 通过部分声转移生成了一个纠的贝尔对,具有84%的真实性.
- 成功证明了决定性的声子发射和捕获.
结论:
- 表面声波声可以被确定性地控制并用于量子信息传输.
- 提供了一个有前途的途径来纠遥远的固态量子位.
- 这项工作确立了声子作为可扩展量子网络的强大量子通信通道.
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