在模拟数字量子模拟器上的热化和临界性
T I Andersen1, N Astrakhantsev2, A H Karamlou2
1Google Research, Mountain View, CA, USA. trondiandersen@google.com.
Nature
|February 5, 2025
概括
这项研究引入了一个69量子比特超导量子模拟器, 它揭示了热化动力学和相位过渡的新见解, 超越了经典的模拟限制.
科学领域:
- 量子模拟
- 凝聚物质物理学
- 量子信息科学
背景情况:
- 在相互作用的量子系统中接近热平衡是一个关键的挑战.
- 量子模拟器需要灵活的状态准备,精确的演变和详细的描述.
- 之前的模拟器在测量和控制方面缺乏多功能性.
研究的目的:
- 展示一个具有混合模拟数字功能的超导量子模拟器.
- 探索超出经典模拟极限的热化动态和相位过渡.
- 展示研究量子现象的先进状态准备和测量.
主要方法:
- 开发一个69量子比特超导量子处理器.
- 实现通用量子门和高可靠性模拟演变.
- 使用多功能测量功能进行状态表征.
- 进行交叉比实验.
主要成果:
- 量子模拟器的性能超过了传统的模拟能力.
- 在 XY 模型中观察到基布尔-祖雷克缩放因粗化而发生的分解.
- 标识了古典的科斯特利茨-图勒斯相位过渡的特征.
- 证明了精确的能量控制,用于研究固态热化假设.
- 展示了纠状态的数字准备和能量/旋转转移的成像.
结论:
- 混合模拟数字量子处理器在多体光谱的状态准备中有效.
- 该平台成功地揭示了热化动态.
- 这项工作提升了量子模拟器在基础物理研究中的潜力.
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