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arXiv 1609.03493hep-th
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波泛函精确重整化的酉网络

Unitary Networks from the Exact Renormalization of Wave Functionals

Jackson R. Fliss, Robert G. Leigh, Onkar Parrikar

摘要:

平坦欧氏空间上$O(N)$矢量模型(大$N$)的精确重整化群(ERG)可以解释为对应于$AdS_{d+1}$上全息对偶高自旋规范理论的体动力学。这是建立在这个意义上,在大$N$的生成泛函的关联函数的单迹运营商是再现的壳作用的散装高自旋理论,这是最简单的一阶(相空间)形式主义。本文将ERG形式推广到$O(N)$矢量模型在自由不动点处任意态的波泛函。我们发现基态和特定的一类激发态的ERG流是通过幺正算符的作用实现的,幺正算符可以被选择为局域的。因此,ERG方程提供了张量网络的连续概念。我们比较这个张量网络与纠缠重整化网络,MERA,其连续版本,cMERA,最近出现在全息上下文中。特别是ERG张量网络似乎共享cMERA的一般结构,但在重要方面有所不同。我们评论可能的全息影响。

英文摘要:

The exact renormalization group (ERG) for $O(N)$ vector models (at large $N$) on flat Euclidean space can be interpreted as the bulk dynamics corresponding to a holographically dual higher spin gauge theory on $AdS_{d+1}$. This was established in the sense that at large $N$ the generating functional of correlation functions of single trace operators is reproduced by the on-shell action of the bulk higher spin theory, which is most simply presented in a first-order (phase space) formalism. In this paper, we extend the ERG formalism to the wave functionals of arbitrary states of the $O(N)$ vector model at the free fixed point. We find that the ERG flow of the ground state and a specific class of excited states is implemented by the action of unitary operators which can be chosen to be local. Consequently, the ERG equations provide a continuum notion of a tensor network. We compare this tensor network with the entanglement renormalization networks, MERA, and its continuum version, cMERA, which have appeared recently in holographic contexts. In particular the ERG tensor network appears to share the general structure of cMERA but differs in important ways. We comment on possible holographic implications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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