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在超导电路中准备和测量三量子比特纠

L Dicarlo¹, M D Reed, L Sun

¹Department of Physics, Yale University, New Haven, Connecticut 06511, USA. leonardo.dicarlo@yale.edu

|October 1, 2010

概括

研究人员证明了超导电路中三量子比特格林伯格-霍恩-齐林格 (GHZ) 状态的确定性产生. 这项工作推进了集成量子计算的量子错误校正.

科学领域:

量子物理学量子物理学是一种量子物理学.
固态系统固态系统

背景情况:

量子纠对于量子力学基础和技术至关重要.
扩展纠超出两个量子比特对于量子错误纠正至关重要.
以前的多量子比特纠是通过自旋,离子和光子实现的.

研究的目的:

在电路量子电力学架构中确定性地产生三量子比特纠.
为了证明多量子比特纠在固态系统中的量子错误纠正的可行性.

主要方法:

使用了一个电路量子电动学架构.
采用量子状态断层扫描来测量保真度.
使用纠证人来确认真正的三量子比特纠.

主要成果:

实现了三量子比特格林伯格-霍恩-齐林格 (GHZ) 状态的确定性生成,其准确度为88%.
通过使用纠目击者,证明了830 ± 80%的双分界的违规行为.
成功将逻辑量子位编码为类似GHZ的状态,这是量子错误校正的基本步骤.

结论:

这项研究证明了迈向集成电路中量子错误纠正多量子比特纠的关键步骤.
实现的忠实性和纠验证为先进的量子计算铺平了道路.

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