论文标题
黑能和拟合问题
Dark energy and the fitting problem
论文作者
论文摘要
在全球范围内，宇宙通常由FLRW指标描述的理想形式拟合。当探测宇宙以确定其动力学时，尤其是这种情况。但是，适合理想形式与真实宇宙的过程并不是唯一的定义。该过程可能取决于用于测量的宇宙探针，因此可能导致尺度因子的时间变化不同。因此，对观察到的宇宙加速扩张的正确解释需要首先对已隐式应用的拟合过程进行彻底理解。在本文中，我们为SNIA，BAO和CMB宇宙探针建立了拟合过程，并推断了相关的平均爱因斯坦方程。我们证明了这些配件在实践中应用的方式导致了明显的黑能效应。我们还强调了SNIA和BAO探针之间的拟合过程的概念差异，另一方面是CMB探针。考虑到这些差异，我们展示了如何解释所谓的哈勃张力。
At a global scale, the universe is generally fitted by an idealized manifold described by the FLRW metric. This is in particular the case when probing the universe to determine its dynamics. The process that fits the idealized manifold to the real universe is however not uniquely defined. This process may depend on the cosmic probe that has been used for the measurements, and could hence lead to different observed temporal evolutions of the scale factor. A correct interpretation of the observed accelerated expansion of the universe requires therefore first a thorough understanding of the fitting process that has been implicitly applied. In this article we establish the fitting processes for the SNIa, BAO and CMB cosmic probes, and deduce the related averaged Einstein equations. We demonstrate that the way these fittings have been applied in practice lead to an apparent dark energy effect. We also highlight the conceptual differences in the fitting processes between the SNIa and BAO probes on the one hand, and the CMB probe on the other hand. Considering those differences, we then show how the so-called Hubble tension can be explained.
