在相互作用的量子电路中观察拓过渡
P Roushan1, C Neill1, Yu Chen1
1Department of Physics, University of California, Santa Barbara, California 93106-9530, USA.
Nature
|November 14, 2014
概括
我们开发了一种新的量子电路方法,以实验地探测量子系统中的拓性质. 这种技术可视化了旋转纹理,并揭示了相互作用诱导的拓相,推进了凝聚物质物理学.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 量子信息科学是一种量子信息科学.
- 量子仿真是一种量子仿真.
背景情况:
- 拓学在理解自然现象方面发挥着至关重要的作用,并重新定义了物质相的概念.
- 由于当前间接方法的局限性,对量子系统中拓排序的直接实验探测仍然是一个重大挑战.
研究的目的:
- 开发和演示使用超导量子电路的新型实验平台,用于研究量子系统的拓性质.
- 克服间接实验工具的局限性,用于物理学中拓学的基础研究.
主要方法:
- 使用超导量子电路来精确控制量子系统.
- 通过测量曲的哈密尔顿空间中的量子轨迹偏移来推断几何曲率.
- 通过整合曲率来揭示拓性质,应用高斯-邦内定理的量子模拟.
- 将该技术与哈尔丹模型进行基准测试,并将其扩展到具有新量子比特架构的交互量子系统.
主要成果:
- 成功地将哈尔丹模型的动量空间映射到一个单量子比特哈密尔顿参数空间.
- 构建了拓相位图,并可视化了微观旋转纹理及其在相位过渡期间的演变.
- 在一个相互作用的量子系统中展示了拓学的研究,发现了相互作用诱导的拓阶段.
- 为量子拓学研究建立了一个强大而可泛化的实验平台.
结论:
- 开发的量子电路技术为探索非相互作用和相互作用的量子系统中的拓现象提供了一个强大而通用的实验平台.
- 这种方法使得直接可视化和对拓性质的基本理解,推进了凝聚物质物理学和量子信息科学领域.
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