论文标题
越过幻影分隔线作为量子过渡的效果
Crossing the phantom divide line as an effect of quantum transitions
论文作者
论文摘要
我们考虑了手性宇宙学模型，该模型由两个标量磁场组成，最小化与重力耦合。在Friedmann-lema \^ıtre-Robertson-Walker（FLRW）时空，对于存在宇宙常数的无质量场，我们介绍了场方程的一般解决方案。具有最大对称性的迷你统计空间配置会导致场景，取决于参数的可接受值 - 对应于典型，五重奏或幻影案例。该模型的规范量化是作为量子状态的不同家族的。幻影线的穿越与田间对称代数的Casimir操作员的自由或结合状态有关。 Quintessence溶液中存在的经典奇异性也在量子水平上解决。
We consider the Chiral cosmological model consisting of two scalar fields minimally coupled to gravity. In the context of a Friedmann--Lema\^ıtre--Robertson--Walker (FLRW) space-time, and for massless fields in the presence of a cosmological constant, we present the general solution of the field equations. The minisuperspace configuration that possesses maximal symmetry leads to scenarios which - depending on the admissible value of the parameters - correspond to a quintessence, quintom or phantom case. The canonical quantization of the model retrieves this distinction as different families of quantum states. The crossing of the phantom line is related to the existence of free or bound states for the Casimir operator of the symmetry algebra of the fields. The classical singularity, which is present in the quintessence solution, is also resolved at the quantum level.
