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arXiv 2009.01252quant-phcond-mat.str-el
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分形量子码

Fractalizing quantum codes

Trithep Devakul, Dominic J. Williamson

摘要:

我们介绍“分形”,自旋模型扩展到高维“分形”自旋模型的过程。这使我们能够解释第二类分形相,分形的分形保护的拓扑相,以及更多,在很好地理解的低维自旋模型。分形化也有助于从已知的自旋模型和量子代码中推导出新的自旋模型和量子代码。我们构建了更高维的广义分形模型,主机扩展分形激发。最后,通过将分形化应用于2D子系统代码,我们产生了一系列本地生成的3D子系统代码,这些代码被限制为使量子信息存储折衷界限饱和。

英文摘要:

We introduce "fractalization", a procedure by which spin models are extended to higher-dimensional "fractal" spin models. This allows us to interpret type-II fracton phases, fractal symmetry-protected topological phases, and more, in terms of well understood lower-dimensional spin models. Fractalization is also useful for deriving new spin models and quantum codes from known ones. We construct higher dimensional generalizations of fracton models that host extended fractal excitations. Finally, by applying fractalization to a 2D subsystem code, we produce a family of locally generated 3D subsystem codes that are conjectured to saturate a quantum information storage tradeoff bound.

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