标题： 在DBI宇宙学中连接几何和势能 显示英文标题

标题： Bridging geometries and potentials in DBI cosmologies

摘要： 我们研究了DBI宇宙学中扭曲函数与势之间的联系，并探讨了它们是否代表幂律解的可能性。 给出了一个处方，利用已知的结果：给定一个扭曲因子，总存在一种势的选择，使得压力和能量密度之间保持恒定比例。 该方法通过具有有趣模型的扭曲因子或势的例子进行了说明。 为了完成这项研究，我们提供了一个利用对称性生成新解的方法；这种方法可以应用于，例如，使用我们的处方得到的幂律宇宙学。 显示英文摘要

摘要： We investigate the link between the warp function and the potential in DBI cosmologies in connection with the possibility they represent power-law solutions. A prescription is given to take advantage of the known result that given a warp factor there is always a choice of potential resulting in a constant ratio between pressure and energy density. The method is illustrated with examples with interesting models for either the warp factor or the potential. We complete this investigation by giving a recipe to exploit symmetries in order to generate new solutions from existing ones; this method can be applied, for instance, to the power-law cosmologies obtained using our prescription.