论文标题
从跑步的手推车熵上切换黑能
Sign Switching Dark Energy from a Running Barrow Entropy
论文作者
论文摘要
巴罗建议，与地平线相关的熵的区域定律可能会因量子重力效应而获得“分形校正” - 代替$ s \ propto to $ a $，我们取而代之的是$ s \ propto a^{1+Δ/2} $，其中$ 0 \leqslantΔ\ leqslant 1 $ $ 0 $ c = $ cemiriation $ ntards Law（$）（$）（$）（$）（$）（$）（$）（$）（$）（$）（$）（$）（$）。我们认为，基于黑洞热力学，我们认为手罗熵应运行（即能量尺度依赖性），这是合理的，因为量子重力校正只有在高能量状态下才有预期很重要。当应用于Friedmann方程时，我们证明了这种运行的手推车熵指数可能会产生动态有效的暗能量的可能性，这在大爆炸中是渐近的积极和消失的。这样的标志切换深色能量可以帮助减轻哈勃张力。讨论了其他宇宙学的含义。
Barrow proposed that the area law of the entropy associated with a horizon might receive a "fractal correction" due to quantum gravitational effects -- in place of $S\propto A$, we have instead $S\propto A^{1+δ/2}$, where $0\leqslant δ\leqslant 1$ measures the deviation from the standard area law ($δ=0$). Based on black hole thermodynamics, we argue that the Barrow entropy should run (i.e., energy scale dependent), which is reasonable given that quantum gravitational corrections are expected to be important only in high energy regime. When applied to the Friedmann equation, we demonstrate the possibility that such a running Barrow entropy index could give rise to a dynamical effective dark energy, which is asymptotically positive and vanishing, but negative at the Big Bang. Such a sign switching dark energy could help to alleviate the Hubble tension. Other cosmological implications are discussed.
