标题： Brans-Dicke引力理论中带有自相互作用标量场的新精确宇宙学解 显示英文标题

标题： New exact cosmological solutions to Brans-Dicke gravity with a self-interacting scalar-field

摘要： 我们通过假设哈勃膨胀参数与标量场的时间导数之间存在线性关系，推导出了一类新的Brans-Dicke引力理论的精确宇宙学解，该理论包含一个自相互作用的标量场和普通物质的幂律完美流体。 作为结果，只有指数势及其组合可以被处理。 详细讨论了所找到的解在描述宇宙演化中的相关性。 我们的讨论主要集中在具有超 quintessence 行为的可能性上。 显示英文摘要

摘要： We derive a new parametric class of exact cosmological solutions to Brans-Dicke theory of gravity with a self-interacting scalar field and a barotropic perfect fluid of ordinary matter, by assuming a linear relationship between the Hubble expansion parameter and the time derivative of the scalar field. As a consequence only a class of exponential potentials and their combinations can be treated. The relevance of the solutions found for the description of the cosmic evolution are discussed in detail. We focus our discussion mainly on the possibility to have superquintessence behavior.