标题： 宇宙常数的最基本调整 显示英文标题

标题： Quintessential Adjustment of the Cosmological Constant

摘要： 我们构建了一个时间依赖的调整机制，用于宇宙学“常数”，这可能在由第五元素和物质主导的晚期弗里德曼-罗伯逊-沃克宇宙中起作用。 它利用了一个与不断演化的标准模型真空能量密度耦合的布兰斯-迪克场。 我们的显式模型具有一种稳定的后期解，其中物质和场的能量密度比保持固定。 不需要对模型参数或初始条件进行微调。 显示英文摘要

摘要： We construct a time dependent adjustment mechanism for the cosmological "constant" which could be at work in a late Friedmann-Robertson-Walker universe dominated by quintessence and matter. It makes use of a Brans-Dicke field that couples to the evolving standard-model vacuum energy density. Our explicit model possesses a stable late-time solution with a fixed ratio of matter and field energy densities. No fine tuning of model parameters or initial conditions is required.