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arXiv 1503.06237hep-thquant-ph
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全息量子纠错码:体/边界对应的玩具模型

Holographic quantum error-correcting codes: Toy models for the bulk/boundary correspondence

Fernando Pastawski, Beni Yoshida, Daniel Harlow, John Preskill

摘要:

我们提出了一个家庭的AdS/CFT对应的一种新的构造的量子纠错码的张量网络结构的基础上,完全可解的玩具模型。我们的构建块是一种特殊类型的张量与最大的纠缠沿任何bipartition,这引起了一个等距从散装希尔伯特空间的边界希尔伯特空间。整个张量网络是量子纠错码的编码器,其中体自由度和边界自由度可以分别被标识为逻辑自由度和物理自由度。这些模型捕捉到了AdS/CFT对应中纠缠的关键特征;特别是,Ryu-Takayanagi公式和三方信息的负性在许多情况下都完全遵守。体逻辑算子可以在多个边界区域上表示,这模拟了从体算子重构边界算子的Rindler-wedge重构,明确实现了Almheiri等人最近提出的AdS/CFT的量子纠错特性. al in arXiv:1411.7041.

英文摘要:

We propose a family of exactly solvable toy models for the AdS/CFT correspondence based on a novel construction of quantum error-correcting codes with a tensor network structure. Our building block is a special type of tensor with maximal entanglement along any bipartition, which gives rise to an isometry from the bulk Hilbert space to the boundary Hilbert space. The entire tensor network is an encoder for a quantum error-correcting code, where the bulk and boundary degrees of freedom may be identified as logical and physical degrees of freedom respectively. These models capture key features of entanglement in the AdS/CFT correspondence; in particular, the Ryu-Takayanagi formula and the negativity of tripartite information are obeyed exactly in many cases. That bulk logical operators can be represented on multiple boundary regions mimics the Rindler-wedge reconstruction of boundary operators from bulk operators, realizing explicitly the quantum error-correcting features of AdS/CFT recently proposed by Almheiri et. al in arXiv:1411.7041.

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