论文标题
修改后的巴罗宇宙学中的全息暗能
Holographic dark energy in modified Barrow cosmology
论文作者
论文摘要
热力学重力猜想意味着重力场方程与热力学的第一定律之间存在深厚的联系。因此，对熵表达式的任何修改都可以直接修改场方程。通过考虑与明显范围相关的修改后的手罗熵，弗里德曼方程也会被修改。在本文中，当熵处于手推车熵的形式时，我们重新考虑全息暗能量（HDE）模型。对熵的这种修饰不仅改变了HDE的能量密度，而且还改变了弗里德曼方程。因此，应在修改后的Friedmann方程式中考虑修改后的HDE。我们将Hubble Horizon和Future Event Horizon作为IR截止，并研究该模型的宇宙学后果。我们还将研究扩展到暗物质（DM）和暗能量（DE）相互作用的情况。我们观察到Barrow指数$δ$显着影响HDE的宇宙学行为，尤其是状态方程（EOS）参数可以越过幻影线$（W_ {de} <-1）$。同样，添加$δ$显着影响减速参数，并改变宇宙相变的时间。
Thermodynamics-Gravity conjecture implies that there is a deep connection between the gravitational field equations and the first law of thermodynamics. Therefore, any modification to the entropy expression, directly modifies the field equations. By considering the modified Barrow entropy associated with the apparent horizon, the Friedmann equations get modified as well. In this paper, we reconsider the holographic dark energy (HDE) model when the entropy is in the form of Barrow entropy. This modification to the entropy not only changes the energy density of HDE, but also modifies the Friedmann equations. Therefore, one should take into account the modified HDE in the context of modified Friedmann equations. We study the Hubble horizon and the future event horizon as IR cutoffs, and investigate the cosmological consequences of this model. We also extend our study to the case where dark matter (DM) and dark energy (DE) interact with each other. We observe that Barrow exponent $δ$ significantly affects the cosmological behavior of HDE, and in particular the equation of state (EoS) parameter can cross the phantom line $(w_{de}<-1)$. Also adding $δ$ remarkably affects the deceleration parameter, and shifts the time of universe phase transition.
