论文标题
V型奇异性具有不均匀方程式的状态
Type V singularities with inhomogeneous equations of state
论文作者
论文摘要
最近,人们对宇宙学奇异性的兴趣已经显着增长,尤其是随着宇宙和黑暗能量的延迟加速,对未来的奇异性。最近的工作根据其力量将这种奇异性的适当分类为强大而虚弱,巨大的奇异性是突然,W和Big Freeze奇异性和强大的奇异性之类的奇异性,例如大RIP。这导致了类型1型,例如大rip是1型,w singularity是V型等各种类型的奇异性的分类。尽管I型I-type IV的奇异性是通过考虑了状态(EOS)的不均匀方程(EOS)的生动讨论,但并未尝试使用V型奇异性。因此,在这项工作中,我们详细讨论了在考虑状态不均匀方程后,各种宇宙学中V型奇异性的形成。在四种不同的宇宙学背景的背景下,我们考虑了EOS的两种不均匀形式。标准的一般相对论宇宙学,一种渐近安全的宇宙学,这是一种受改良区域 - 肠关系的启发,广义不确定性原理,全息重态化和Chern-simons Gravity(所有这些都可以由相同形式的弗里德曼方案)和F(r)f(R)术语(r)术语(R)术语(r)术语术。我们详细说明,当人们提出这样的考虑时,人们会看到V型奇点的发生条件有一些很大的差异。在F(r)重力宇宙学的特殊情况下,我们看到V型奇点已被完全消除。这项工作表明,V型奇点的创造和形成受一个人认为的方程式的形式影响最大,而不是一个人选择的背景宇宙学。
Interest in cosmological singularities has remarkably grown in recent times, particularly on future singularities with the discovery of late-time acceleration of the universe and dark energy. Recent work has seen a proper classification of such singularities into strong and weak based on their strength, with weak singularities being the likes of sudden, w and big freeze singularities and strong singularities like the big rip. This has led to a classification of such singularities in various types like Big rip is Type 1, w-singularity is type V etc. While singularities of type I-type IV have been discussed vividly by taking into account inhomogeneous equations of state (EOS), the same has not been attempted for type V singularities. So in this work we have discussed in detail about the formation of type V singularities in various cosmologies after considering inhomogeneous equations of state. We consider two inhomogeneous forms of the EOS in the context of four different cosmological backgrounds ; standard general relativistic cosmology, an asymptotically safe cosmology, a cosmology inspired by modified area-entropy relations, generalized uncertainty principles, holographic renormalization and Chern-Simons gravity( all of which can be coincidentally described by the same form of the modified Friedmann equation) and an f(R) gravity cosmology. We show in detail that one sees some very big differences in the occurence conditions of type V singularities when one makes such considerations. In the particular case of the f(R) gravity cosmology, we see that the type V singularities get completely removed. This work goes to show that the creation and formation of type V singularities is influenced most strongly by the form of the equation of state that one considers, way more so than what background cosmology one chooses.