在中的捐赠电子之间的两量子比特门
Y He1, S K Gorman1, D Keith1
1Centre of Excellence for Quantum Computation and Communication Technology, School of Physics, University of New South Wales, Sydney, New South Wales, Australia.
Nature
|July 19, 2019
概括
研究人员实现了中原子量子位的快速两量子位交换. 这一突破使得使用精确放置的原子量子位可扩展的量子计算电路.
科学领域:
- 量子计算
- 原子物理
- 固态物理
背景情况:
- 中的电子自旋量子比特提供了较长的连贯时间和高保真性控制.
- 对于可扩展的量子电路来说,量子位之间的合至关重要,但对于基于原子的量子位来说却是一个重大挑战.
- 之前试图在中的捐赠量子位之间创建可调的交换相互作用是没有成功的.
研究的目的:
- 为了证明中的捐赠电子旋转量子位之间的快速两量子位交换门.
- 为了实现多量子位量子电路所必需的可调性交换相互作用.
- 为多量子位捐赠量子位系统提供有效表征的途径.
主要方法:
- 在中设计了原子尺度的捐赠量子位.
- 实现了一个快速的两量子比特交换门,持续时间约为800比秒.
- 使用独立的单射旋读数,准确度约为94%.
主要成果:
- 成功演示了捐赠电子旋转量子位之间的[公式:见文本]双量子位交换门.
- 实现了对量子计算至关重要的快门运算 (千兆赫尺度).
- 建立了一种独立的单射旋转读数方法,具有高准确性.
结论:
- 开发可调节的交换互动是建立基于捐赠量子位的可扩展量子计算机的关键一步.
- 精确的量子位放置的原子规模工程使多量子位电路的创建和表征变得容易.
- 这项工作为先进的量子信息处理铺平了道路,
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