From Path Integrals to Tensor Networks for AdS/CFT
Abstract
In this paper, we discuss tensor network descriptions of AdS/CFT from two different viewpoints. First, we start with an Euclidean path-integral computation of ground state wave functions with a UV cut off. We consider its efficient optimization by making its UV cut off position dependent and define a quantum state at each length scale. We conjecture that this path-integral corresponds to a time slice of AdS. Next, we derive a flow of quantum states by rewriting the action of Killing vectors of AdS3 in terms of the dual 2d CFT. Both approaches support a correspondence between the hyperbolic time slice H2 in AdS3 and a version of continuous MERA (cMERA). We also give a heuristic argument why we can expect a sub-AdS scale bulk locality for holographic CFTs.
Cite
@article{arxiv.1609.04645,
title = {From Path Integrals to Tensor Networks for AdS/CFT},
author = {Masamichi Miyaji and Tadashi Takayanagi and Kento Watanabe},
journal= {arXiv preprint arXiv:1609.04645},
year = {2017}
}
Comments
33 pages, Latex, 5 figures, clarifications added, typos corrected, a picture of a folded MERA network for a symmetric product CFT added