论文标题
与物质创造有关熵宇宙学的宇宙学限制
Cosmological Constraints on Entropic Cosmology with Matter Creation
论文作者
论文摘要
我们研究了熵力宇宙学模型，具有物质创造和能量交换的可能性，并且在均匀和各向同性平坦宇宙的地平线和地平线之间。我们考虑三种不同类型的熵，Bekenstein's，非扩展的Tsallis-cirto和四分之一的熵，以及一些现象学功能形式，用于物质创建率，以模拟不同的熵力模型并将观察性约束放在它们上。我们表明，尽管它们中的大多数基本上与标准的$λ$ CDM方案无法区分，但Bekenstein熵力模型的创建速率与Hubble参数成正比在统计上高于$λ$ CDM。一般而言，我们还发现，霍金温度参数$γ$都与宇宙和边界之间的能量交换有关，而物质创造率$γ（t）$都必须很小，以便复制观察数据。
We investigate entropic force cosmological models with the possibility of matter creation and energy exchange between the bulk and the horizon of a homogeneous and an isotropic flat Universe. We consider three different kinds of entropy, Bekenstein's, the non-extensive Tsallis-Cirto's and the quartic entropy, plus some phenomenological functional forms for matter creation rate to model different entropic force models and put the observational constraints on them. We show that while most of them are basically indistinguishable from a standard $Λ$CDM scenario, the Bekenstein entropic force model with a matter creation rate proportional to the Hubble parameter is statistically highly favored over $Λ$CDM. As a general result, we also find that both the Hawking temperature parameter $γ$, which relates the energy exchange between the bulk and the boundary of the Universe, and the matter creation rate $Γ(t)$, must be very small in order to reproduce observational data.
