论文标题
无质量DE Sitter QFTS中的反反应：全息，重力DBI动作和F（R）重力
Back-reaction in massless de Sitter QFTs: holography, gravitational DBI action and f(R) gravity
论文作者
论文摘要
我们采用仪表奖励双重性来研究4维大$ n $量子场理论在恒定侵蚀背景，尤其是Sitter时空的反应效应。所考虑的现场理论是全息QFT，在紫外线和IR CFT之间双重流动。我们计算了4D爱因斯坦歧管背景的重力有效作用的全息QFT贡献。我们发现，对于宇宙常数的给定值$λ$，只要$λ<λ_ {\ textrm {max}} \ sim m_p^2 / n^2 $，通常存在两个反应的常量曲率解决方案，否则就不存在。此外，反应效应在紫外线和IR CFT之间插值。我们还发现，在有限的截止下，全息理论总是降低裸露的宇宙常数，这是全息QFTS在DE Sitter上的分区功能的热力学特性的结果。
We employ gauge-gravity duality to study the backreaction effect of 4-dimensional large-$N$ quantum field theories on constant-curvature backgrounds, and in particular de Sitter space-time. The field theories considered are holographic QFTs, dual to RG flows between UV and IR CFTs. We compute the holographic QFT contribution to the gravitational effective action for 4d Einstein manifold backgrounds. We find that for a given value of the cosmological constant $λ$, there generically exist two backreacted constant-curvature solutions, as long as $λ< λ_{\textrm{max}} \sim M_p^2 / N^2$, otherwise no such solutions exist. Moreover, the backreaction effect interpolates between that of the UV and IR CFTs. We also find that, at finite cutoff, a holographic theory always reduces the bare cosmological constant, and this is the consequence of thermodynamic properties of the partition function of holographic QFTs on de Sitter.
