论文标题
小说$ 4D $ Einstein-Gauss-Bonnet De-Sitter重力
Greybody factor and power spectra of the Hawking radiation in the novel $4D$ Einstein-Gauss-Bonnet de-Sitter gravity
论文作者
论文摘要
我们研究了新颖的$ 4D $ EINSTEIN-GAUSS-BONNET重力中的鹰辐射，该重力最近由Glavan和Lin [Phys [Phys。莱特牧师。 124，081301（2020）]。我们首先找到$α$和$λ$的约束，以保留时空中的DS黑洞。研究了灰体因子和无数标量的鹰辐射的功率谱，用于各种参数的全部范围，包括GB耦合常数$α$，宇宙常数$λ$以及与标量$ξ$数值相关的常数。特别是，我们发现负$α$的灰色因子比$α\ ge0 $的情况大。而允许的负$α$的鹰辐射的功率光谱高于非负$α$的其他功率。原因是当$α<0 $，即使$α$接近下限时，黑洞的温度也会很高，温度也将是任意高的。
We investigate Hawking radiation in the novel $4D$ Einstein-Gauss-Bonnet gravity which is recently formulated by Glavan and Lin [Phys. Rev. Lett. 124, 081301 (2020)]. We first find the constraints on $α$ and $Λ$ to retain a dS black hole in the spacetime. Both the greybody factor and the power spectra of the Hawking radiation of the massless scalar are studied for the full range of various parameters including the GB coupling constant $α$, the cosmological constant $Λ$ and the constant related to the scalar $ξ$ numerically. In particular, we find the greybody factor is larger for a negative $α$ than the case for $α\ge0$. While, the power spectra of the Hawking radiation is higher for a allowed negative $α$ than others with non-negative $α$. The reason is that the temperature of the black hole would be very high when $α<0$, even when $α$ approaches the lower bound, the temperature would be arbitrary high.
