论文标题
手性k- essence宇宙学的五重奏场
Quintom fields from chiral K-essence cosmology
论文作者
论文摘要
在本文中，我们从K- essence形式主义的角度介绍了手性宇宙学场景。在此设置中，几个标量场在动力学和潜在扇区中相互作用。但是，我们仅考虑一个扁平的弗里德曼 - 罗伯逊 - 拉玛 - \^ıtre-walker Universe，耦合到两个五重五个领域：一个典型和一个幻影。我们检查了获得分析解决方案的经典宇宙学框架。确实，我们通过``大弹跳''介绍了``大爆炸''奇点的解释。此外，具有正压流体描述，对于特定的参数，幻影线实际上已经越过。此外，对于量子对应物，对于已考虑因子排序问题的各种实例，可以分析旋转 - dewitt方程（通过因子q来衡量）。因此，这种方法使我们能够计算前两个经典子案例的概率密度。事实证明，其行为实际上被缩减为标度因子和标量场的发展。当因子排序常数$ \ rm q \ ll 0 $时，它也倾向于幻影扇区。
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--Lama\^ıtre--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 $\rm Q\ll 0$.
