Universal upper bound on the inflationary energy scale from the trans-Planckian censorship conjecture
Universal upper bound on the inflationary energy scale from the trans-Planckian censorship conjecture
复制标题
DOI：
10.1103/physrevd.102.021301
复制
发表时间：
2020-07-21
影响因子：
5
通讯作者：
Zhang, Yun-Long
中科院分区：
文献类型：
--
作者：
Mizuno, Shuntaro;Mukohyama, Shinji;Zhang, Yun-Long
我们研究了最近提出的trans-Planckian审查猜想（TCC）对暴胀能量尺度的限制。我们发现一个普遍的上限的通货膨胀哈勃膨胀率H-inf，这是唯一的再加热温度T-rh：H-inf/M-pl小于或类似于T-0/T-rh，其中T-0是光子温度今天决定。上限可以通过临界状态方程参数w近似为1/3的后暴胀振荡阶段或多级暴胀模型来饱和。在大爆炸核合成所需的最低再加热温度下，CMB尺度下张量标量比r的上限是r小于或接近10（-8），这可以在许多弦激发的暴胀模型中实现。
We study the constraint on the inflationary energy scale from the recently proposed trans-Planckian censorship conjecture (TCC). We find a universal upper bound on the inflationary Hubble expansion rate H-inf which is solely determined by the reheating temperature T-rh: H-inf/M-pl less than or similar to T-0/T-rh, where T-0 is the photon temperature today. The upper limit can be saturated by a postinflationary oscillatory stage with the critical equation-of-state parameter w approximate to 1/3, or by an inflation model with multiple stages. In the lowest reheating temperature required for big bang nucleosynthesis, the upper bound on the tensor-to-scalar ratio r at the CMB scales is r less than or similar to 10(-8), which can be realized in many string-inspired inflation models.