基于可重新配置的原子阵列的逻辑量子处理器
Dolev Bluvstein1, Simon J Evered1, Alexandra A Geim1
1Department of Physics, Harvard University, Cambridge, MA, USA.
Nature
|December 6, 2023
概括
研究人员开发了一个可编程的量子处理器, 使用编码的逻辑量子位, 显著改善了量子错误的纠正. 这一进步通过提高门的可靠性和算法性能来克服大规模量子计算的关键挑战.
科学领域:
- 量子信息科学
- 量子计算
- 量子错误纠正
背景情况:
- 压制错误对于有用的量子计算至关重要,需要量子错误校正 (QEC).
- 错误纠正逻辑量子比特的开销对于大规模量子计算来说是一个主要障碍.
- 现有的量子处理器在实现高保真性和可扩展性方面面临挑战.
研究的目的:
- 使用编码逻辑量子位实现可编程量子处理器.
- 展示了改进的量子错误校正能力和算法性能.
- 克服与逻辑量子比特实现相关的高层挑战.
主要方法:
- 使用中性原子阵列开发多达280个物理量子位的可编程量子处理器.
- 实现逻辑级控制,区分架构和任意连接.
- 使用各种编码方案,包括表面代码和颜色代码,用于纠错.
主要成果:
- 通过扩展表面代码距离, 证明了双量子比特网关的可靠性.
- 实现了颜色代码量子位和逻辑GHZ状态的故障耐受性创建.
- 成功执行多达48个逻辑量子位的复杂采样电路, 超过物理量子位的忠实性.
结论:
- 开发的逻辑量子处理器通过错误检测显著提高了算法性能.
- 这项工作标志着朝着早期错误纠正量子计算迈出的重要一步.
- 这些发现为大规模逻辑量子处理器的开发提供了明确的途径.
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