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arXiv 1810.08992hep-thquant-ph
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局部哈密顿量之间全息对偶的玩具模型

Toy Models of Holographic Duality between local Hamiltonians

Tamara Kohler, Toby Cubitt

摘要:

全息量子纠错码(HQECC)已经被提出作为AdS/CFT对应的玩具模型,并表现出许多对偶性的特征。HQECC给出了状态和可观量的映射。然而,他们不映射本地散装哈密顿的边界上的本地哈密顿。在这项工作中,我们结合HQECC与哈密顿模拟理论,构建一个局部哈密顿之间的体边界映射,同时保留了HQECC对偶的所有功能。这使我们能够构建模型之间的对偶性,包括体积和边界能量尺度和时间动态之间的关系。它还允许我们在相反的方向上构建一个映射:从局部边界哈密顿量到相应的局部哈密顿量。在这种边界到体的映射下,体几何作为一种近似的、低能量的、有效的理论出现在边界上的(近似的)HQECC的代码空间中。在更高的能量尺度上,这种新出现的大块几何形状被修改,以匹配以前为HQECC提出的黑洞玩具模型。此外,动力学层次上的对偶性显示了这些玩具模型黑洞是如何动态地形成的。

英文摘要:

Holographic quantum error correcting codes (HQECC) have been proposed as toy models for the AdS/CFT correspondence, and exhibit many of the features of the duality. HQECC give a mapping of states and observables. However, they do not map local bulk Hamiltonians to local Hamiltonians on the boundary. In this work, we combine HQECC with Hamiltonian simulation theory to construct a bulk-boundary mapping between local Hamiltonians, whilst retaining all the features of the HQECC duality. This allows us to construct a duality between models, encompassing the relationship between bulk and boundary energy scales and time dynamics. It also allows us to construct a map in the reverse direction: from local boundary Hamiltonians to the corresponding local Hamiltonian in the bulk. Under this boundary-to-bulk mapping, the bulk geometry emerges as an approximate, low-energy, effective theory living in the code-space of an (approximate) HQECC on the boundary. At higher energy scales, this emergent bulk geometry is modified in a way that matches the toy models of black holes proposed previously for HQECC. Moreover, the duality on the level of dynamics shows how these toy-model black holes can form dynamically.

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