论文标题
幂律创世纪：强耦合和类似伽利昂的矢量场
Power-law Genesis: strong coupling and galileon-like vector fields
论文作者
论文摘要
用早期宇宙创世记时代构建模型的一种简单方法是采用玻体田，在缩放转换下，其lagrangians的lagrangians均一变化。我们表明，在这些理论中，对于定义拉格朗日的一系列参数，存在平坦时空中的均质幂律解决方案，其能量密度消失，而压力为负（幂律创世纪）。我们发现了这种情况的经典现场理论描述的合法性条件。我们注意到，这种情况不适合我们与矢量场的早期创世纪模型。我们在平坦时空中使用矢量字段和幂律背景解决方案构建了另一个模型，该模型违反了NEC，并且是稳定的。打开重力后，该模型描述了早期的创世纪阶段。
A simple way to construct models with early cosmological Genesis epoch is to employ bosonic fields whose Lagrangians transform homogeneously under scaling transformation. We show that in these theories, for a range of parameters defining the Lagrangian, there exists a homogeneous power-law solution in flat space-time, whose energy density vanishes, while pressure is negative (power-law Genesis). We find the condition for the legitimacy of the classical field theory description of such a situation. We note that this condition does not hold for our earlier Genesis model with vector field. We construct another model with vector field and power-law background solution in flat space-time, which is legitimately treated within classical field theory, violates the NEC and is stable. Upon turning on gravity, this model describes the early Genesis stage.
