论文标题
巴罗熵的重子不对称：理论预测和观察性约束
Baryon asymmetry from Barrow entropy: theoretical predictions and observational constraints
论文作者
论文摘要
我们研究了由于手推车熵引起的弗里德曼方程中带来的校正的生成重子不对称性。特别是，通过应用重力 - 热动力学猜想，人们在弗里德曼方程中获得了额外的术语，这些术语改变了辐射主导的时期期间哈勃函数演变的额外术语。因此，即使在RICCI标量和重子电流之间进行标准耦合的情况下，它们也可能导致非零的Baryon不对称性。为了匹配观察结果，我们发现手推车指数应在$ 0.005 \lyssimδ\ Lessim 0.008 $的间隔中，这与标准的Bekenstein-Hawking熵相对应。上界比其他观察性约束更紧密，但是有趣的特征是，在当前分析中，我们获得了一个非零的下限。然而，如果巴罗修饰的宇宙学中的重子不对称是由其他机制产生的，而与巴罗修饰无关的，那么这种下限将消失。
We investigate the generation of baryon asymmetry from the corrections brought about in the Friedman equations due to Barrow entropy. In particular, by applying the gravity-thermodynamics conjecture one obtains extra terms in the Friedmann equations that change the Hubble function evolution during the radiation-dominated epoch. Hence, even in the case of standard coupling between the Ricci scalar and baryon current they can lead to a non-zero baryon asymmetry. In order to match observations we find that the Barrow exponent should lie in the interval $0.005 \lesssim Δ\lesssim 0.008$, which corresponds to a slight deviation from the standard Bekenstein-Hawking entropy. The upper bound is tighter than the one of other observational constraints, however the interesting feature is that in the present analysis we obtain a non-zero lower bound. Nevertheless this lower bound would disappear if the baryon asymmetry in Barrow-modified cosmology is generated by other mechanisms, not related to the Barrow modification.
