在78量子比特处理器上随机多极驱动的预热化
Zheng-He Liu1,2, Yu Liu1,2, Gui-Han Liang1,2
1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.
Nature
|January 28, 2026
概括
研究人员使用结构性随机驱动器观察了量子系统中长期存在的热前阶段. 预热寿命可以根据驱动频率和多极顺序调整,在超导量子处理器中显示普遍的缩放规律.
科学领域:
- 量子仿真是一种量子仿真.
- 非平衡的多体物理学.
- 量子信息科学是一种量子信息科学.
背景情况:
- 时间依赖的驱动器可以探索异国情调的非平衡现象.
- 驱动器诱导的加热通常会破坏量子系统的稳定.
- 周期 (Floquet) 驱动器可以抑制高频模式中的加热.
研究的目的:
- 研究非周期驱动量子系统中的加热抑制.
- 通过实验观察和描述热前阶段.
- 探索热前生命周期的可调性和缩放规律.
主要方法:
- 使用了一个78量子比特超导量子处理器 (Chuang-tzu 2.0).
- 采用结构化随机协议,可调节加热速率.
- 测量了1000个驾驶周期的粒子失衡和子系统纠.
- 在不同的子系统上进行量子状态断层扫描.
主要成果:
- 观测到长期存在的热前阶段和热前高原.
- 经过证明的"双调"预热寿命 (按频率和多极顺序).
- 发现了前热寿命与频率的代数式增长,遵循普遍缩放指数2n+1.1.
- 观察到不均的空间纠和从面积到体积定律缩放的交叉.
- 研究了超出经典模拟能力的动力学.
结论:
- 超导量子处理器是研究非平衡物理学的强大平台.
- 观察到的现象和缩放规律对于理解量子驱动系统很重要.
- 这项工作为探索复杂量子体制中的普遍缩放规律开辟了道路.
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