标题： 标量-张量理论中宇宙学观测的共形框架（不）依赖性 显示英文标题

标题： Conformal-Frame (In)dependence of Cosmological Observations in Scalar-Tensor Theory

摘要： 我们提供了标量-张量引力中乔丹框架和爱因斯坦框架变量之间的对应关系，并考虑了宇宙学观测量的框架-(不)依赖性。 特别地，我们表明宇宙学观测量/关系（红移，光度距离，温度各向异性）是框架无关的。 我们还研究了曲率扰动的框架依赖性，并发现如果扰动是绝热的且物质与布兰斯-迪克标量之间的熵扰动为零，则曲率扰动是共形不变的。 还讨论了两种框架中各种曲率扰动定义之间的关系，并明确了等价条件。 显示英文摘要

摘要： We provide the correspondence between the variables in the Jordan frame and those in the Einstein frame in scalar-tensor gravity and consider the frame-(in)dependence of the cosmological observables. In particular, we show that the cosmological observables/relations (redshift, luminosity distance, temperature anisotropies) are frame-independent. We also study the frame-dependence of curvature perturbations and find that the curvature perturbations are conformal invariant if the perturbation is adiabatic and the entropy perturbation between matter and the Brans-Dicke scalar is vanishing. The relation among various definitions of curvature perturbations in the both frames is also discussed, and the condition for the equivalence is clarified.