在单个量子比特门中取消主动泄漏
1Google Quantum AI, Santa Barbara, California 93111, USA.
Physical review letters
|October 12, 2025
概括
研究人员开发了主动泄漏取消,以提高量子门的速度和准确性. 这种技术显著减少了超导跨子量子比特中的错误,为更强大的量子计算机铺平了道路.
科学领域:
- 量子计算是一种量子计算.
- 量子信息科学 量子信息科学
- 超导电路中的超导电路
背景情况:
- 快速而准确的量子门对于量子计算至关重要.
- 物理量子比特通常有两个以上的层次,导致更快门的泄漏错误.
研究的目的:
- 通过减少泄漏错误来提高单量子比特网关性能.
- 引入和验证一种新型的活性泄漏取消技术.
主要方法:
- 在泄漏过渡处实施了第二个驱动音调,以取消主驱动引起的泄漏.
- 开发了一种测量序列,用于校准泄漏取消参数.
- 将该技术应用于超导跨子量子比特.
主要成果:
- 与标准的衍生物去除技术相比,达到20倍的泄漏减少.通过亚亚巴特门 (DRAG) 技术.
- 证明了一个连贯性有限的门不忠度为7.5x10^-5的 10 ns pi/2 门.
- 减少泄漏,使其低于10-5级.
结论:
- 主动泄漏取消是一种有效的方法来抑制超导量子比特中的错误.
- 开发的技术显著提高了门的可靠性,减少了泄漏,推进了量子计算硬件.
- 这种方法为构建更可靠,更强大的量子计算机提供了一条道路.
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