Holographic de Sitter spacetime and quantum corrections to the cosmological constant
Holographic de Sitter spacetime and quantum corrections to the cosmological constant
复制标题
全息德西特时空和宇宙常数的量子修正
DOI：
10.1093/ptep/ptaa122
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发表时间：
2020
影响因子：
3.5
通讯作者：
Yokoyama Shuichi
中科院分区：
文献类型：
--
作者：
S. Funatsu;H. Hatanaka;Y. Hosotani;Y. Orikasa;and N. Yamatsu;Yokoyama Shuichi
A dynamical aspect of quantum gravity on de Sitter spacetime is investigated by holography and the de Sitter/conformal field theory correspondence. We show that de Sitter spacetime emerges from a free Sp() vector model by complexifying the ghost fields and course-graining them by flow equation in parallel to the imaginary axis. We confirm that the emergence of de Sitter spacetime is ensured by conformal symmetry. We also compute the quantum corrections to the cosmological constant up to the next-to-leading order of theexpansion in a proposed holographic approach. As a result the sub-leading corrections have the opposite sign to the classical value. This implies that a quantum gravity on de Sitter spacetime is perturbatively stable and quantum effects make the universe flatter and the cosmological constant smaller.
