论文标题
变色龙模型中的重力耦合
Gravitational couplings in Chameleon models
论文作者
论文摘要
我们考虑了宇宙学模型，其中通过配备变色龙筛选机制的动力场描述了暗能量，该模型将其效果隐藏在局部密集区域并符合太阳系观测值。在这些模型中，没有通用的引力耦合，在这里，我们研究了确定大量物体（$ g_n $）和引力波的传播的有效耦合，$ g_ {gw} $。特别是，我们在不忽略嵌入当地区域的银河环境的时间依赖性的情况下重新审视了变色龙筛选机制，并分析了可以用Lunar Laser Laser ranging and direction rangatiation wave测试的$ g_n $和$ g_ {gw} $的诱导时间演变。我们明确地展示了这两个耦合的方式以及为什么有所不同。我们还发现，由于变色龙筛选机制的特殊方式，它们的时间演变在弱场非相关近似中受到了高度抑制。
We consider cosmological models where dark energy is described by a dynamical field equipped with the Chameleon screening mechanism, which serves to hide its effects in local dense regions and to conform to Solar System observations. In these models, there is no universal gravitational coupling and here we study the effective couplings that determine the force between massive objects, $G_N$, and the propagation of gravitational waves, $G_{gw}$. In particular, we revisit the Chameleon screening mechanism without neglecting the time dependence of the galactic environment where local regions are embedded in, and analyze the induced time evolution on $G_N$ and $G_{gw}$, which can be tested with Lunar Laser Ranging and direct gravitational waves observations. We explicitly show how and why these two couplings generically differ. We also find that due to the particular way the Chameleon screening mechanism works, their time evolutions are highly suppressed in the weak-field non-relativistic approximation.
