论文标题
带电的4D Einstein-Gauss-Bonnet-Ads黑洞：阴影，能量发射，挠度角和热发动机
Charged 4D Einstein-Gauss-Bonnet-AdS Black Holes: Shadow, Energy Emission, Deflection Angle and Heat Engine
论文作者
论文摘要
最近，人们对4D Einstein-Gauss-Bonnet（4D EGB）重力理论引起了人们的关注，该理论绕过了Lovelock定理并避免了Ostrogragradsky的不稳定。这种新颖的理论具有非平凡的动力学，并为宇宙学和黑洞物理学提出了一些预测。通过最近的天体物理观测和反de保姆时空的重要性，我们研究了来自4D EGB重力理论的带电广告的阴影几何形状和光的偏转角。我们在这样的黑洞周围探索阴影行为和光子球，并检查不同参数对它们的影响。然后，我们提出了一项有关此类黑洞的能量发射速率的研究，并分析了高斯河网（GB）耦合常数在辐射过程中的重要作用。然后，我们通过获得矩形发动机周期的效率来对带电4D EGB-ADS黑洞的全息热发动机进行讨论。最后，通过将热发动机效率与Carnot效率进行比较，我们表明比率$ \ frac {η} {η_{C}} $始终小于与热力学第二定律一致的比率。
Recently, there has been a surge of interest in the 4D Einstein-Gauss-Bonnet (4D EGB) gravity theory which bypasses the Lovelock theorem and avoids Ostrogradsky's instability. Such a novel theory has nontrivial dynamics and presents several predictions for cosmology and black hole physics. Motivated by recent astrophysical observations and the importance of anti-de Sitter spacetime, we investigate shadow geometrical shapes and deflection angle of light from the charged AdS black holes in 4D EGB gravity theory. We explore the shadow behaviors and photon sphere around such black holes, and inspect the effect of different parameters on them. Then, we present a study regarding the energy emission rate of such black holes and analyze the significant role of the Gauss-Bonnet (GB) coupling constant in the radiation process. Then, we perform a discussion of holographic heat engines of charged 4D EGB-AdS black holes by obtaining the efficiency of a rectangular engine cycle. Finally, by comparing heat engine efficiency with the Carnot efficiency, we indicate that the ratio $\frac{η}{η_{c}}$ is always less than one which is consistent with the thermodynamic second law.
