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在网关定义的量子点中违反贝尔不等式
Paul Steinacker1, Tuomo Tanttu2,3, Wee Han Lim2,3
1School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, 2052, Australia. p.steinacker@unsw.edu.au.
Nature communications
|April 23, 2025
概括
研究人员通过违反贝尔不等式来证明量子点中的量子纠. 这一关键的里程碑证明了量子纠,对于量子计算的优势至关重要,使用高级协议用于高保真度自旋量子比特.
科学领域:
- 量子信息科学 量子信息科学
- 固态物理 固态物理
- 量子计算是一种量子计算.
背景情况:
- 量子计算机利用纠来提高计算能力.
- 在自旋量子比特中验证非经典的相关性 (纠) 是至关重要的,但具有挑战性.
- 之前的努力在同时实现高竞争性和读数保真性方面遇到了困难.
研究的目的:
- 为了证明在量子点系统中违反贝尔不等式.
- 为了实现对自旋量子比特的高准确度量子运算和测量.
- 在一个可扩展的量子比特平台中证明真正的量子纠.
主要方法:
- 使用预告初始化和门组断层扫描 (GST) 进行校准.
- 实现了超过99%的完整2量子比特网关集的保真度,包括状态准备和测量 (SPAM).
- 雇佣了贝尔不等式违规测量的直接平价读数.
主要成果:
- 证明了97.17%的贝尔状态忠实度,没有读出错误的纠正.
- 通过2.731.1的贝尔信号 (S) 违反了贝尔不等式.
- 超出了经典的极限,即使在1.1K和纠寿命高达100μs.
结论:
- 在量子点中违反贝尔不等式证实了量子纠.
- 这一成就是实现量子优势的重要里程碑.
- 证明的高保真度为中强大的量子计算铺平了道路.
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