Holographic entanglement entropy of de Sitter braneworld
Abstract
We study the holographic representation of the entanglement entropy, recently proposed by Ryu and Takayanagi, in a braneworld context. The holographic entanglement entropy of a de Sitter brane embedded in an anti-de Sitter (AdS) spacetime is evaluated using geometric quantities, and it is compared with two kinds of de Sitter entropy: a quarter of the area of the cosmological horizon on the brane and entropy calculated from the Euclidean path integral. We show that the three entropies coincide with each other in a certain limit. Remarkably, the entropy obtained from the Euclidean path integral is in precise agreement with the holographic entanglement entropy in all dimensions. We also comment on the case of a five-dimensional braneworld model with the Gauss-Bonnet term in the bulk.
Keywords
Cite
@article{arxiv.hep-th/0606027,
title = {Holographic entanglement entropy of de Sitter braneworld},
author = {Yukinori Iwashita and Tsutomu Kobayashi and Tetsuya Shiromizu and Hirotaka Yoshino},
journal= {arXiv preprint arXiv:hep-th/0606027},
year = {2009}
}
Comments
5 pages, no figures, minor corrections, accepted for publication in Phys. Rev. D