标题： 宇宙学中的等效原理 显示英文标题

标题： Equivalence Principle in Cosmology

摘要： 我们分析了弗里德曼-勒梅特-罗伯逊-沃尔克时空中的哈勃观测者所遵循的爱因斯坦等效原理（EEP）。我们表明，FLRW时空中光锥的仿射结构应局部地用光学度规来处理，由于观测者钟的固有时对局部光传播方程的非均匀参数化，该光学度规不能简化为闵可夫斯基度规。这种差异的物理后果是，本地测量的无线电波多普勒频移会受到哈勃膨胀的影响。 显示英文摘要

摘要： We analyse the Einstein equivalence principle (EEP) for a Hubble observer in Friedmann-Lemaitre-Robertson-Walker spacetime. We show that the affine structure of light cone in the FLRW spacetime should be treated locally in terms of the optical metric which is not reduced to the Minkowski metric due to the non-uniform parametrization of the local equations of light propagation with the proper time of the observer's clock. The physical consequence of this difference is that the Doppler shift of radio waves measured locally, is affected by the Hubble expansion.