期刊
UNIVERSE
卷 8, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/universe8100548
关键词
chiral cosmology; quintom fields; K-essence; exact solutions; bounce cosmology
资金
- PROMEP [UGTO-CA-3]
- SNI-CONACyT
- CONACyT Estancias posdoctorales por Mexico
In this paper, a chiral cosmological scenario is analyzed using the K-essence formalism. It is observed that the big-bang singularity can be explained by a big-bounce in certain conditions. The probability density of the classical subcases is computed through the analysis of the quantum counterpart.
In this paper, we present an analysis of a chiral cosmological scenario from the perspective of K-essence formalism. In this setup, several scalar fields interact within the kinetic and potential sectors. However, we only consider a flat Friedmann-Robertson-Lamaitre-Walker universe coupled minimally to two quintom fields: one quintessence and one phantom. We examine a classical cosmological framework, where analytical solutions are obtained. Indeed, we present an explanation of the big-bang singularity by means of a big-bounce. Moreover, having a barotropic fluid description and for a particular set of parameters, the phantom line is in fact crossed. Additionally, for the quantum counterpart, the Wheeler-DeWitt equation is analytically solved for various instances, where the factor-ordering problem has been taken into account (measured by the factor Q). Hence, this approach allows us to compute the probability density of the previous two classical subcases. It turns out that its behavior is in effect damped as the scale factor and the scalar fields evolve. It also tends towards the phantom sector when the factor ordering constant Q << 0.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据