We propose a dark energy model based on the physics of critical phenomena which is consistent with both the Planck's CMB and the Riess et al.'s local Hubble measurements. In this model the dark energy density behaves like the order parameter of a generic system which undergoes a phase transition. This means the dark energy is an emergent phenomenon and we named it critically emergent dark energy model, CEDE. In CEDE, dark energy emerges at a transition redshift, z_c , corresponding to the critical temperature in critical phenomena. Combining the Planck CMB data and local measurement of the Hubble constant from Riess et al. (2019) we find statistically significant support for this transition with respect to the case of very early transition that represents effectively the cosmological constant. This is understandable since CEDE model naturally prefers larger values of Hubble constant consistent with local measurements. Since CEDE prefers a non-trivial transition when we consider both high redshift Planck CMB data and local Hubble constant measurements, we conclude that H ₀ tension may be a hint for the substructure of the dark energy as a well-studied properties of critical phenomena. However if we add BAO and SNe datasets then CEDE prefers lower value for H ₀. This means the H ₀ tension still exist but it is milder than ΛCDM's.

我们提出了一个基于临界现象物理学的暗能量模型，该模型与普朗克的 CMB 和里斯等人的局部哈勃测量结果一致。在该模型中，暗能量密度的行为类似于经历相变的通用系统的有序参数。这意味着暗能量是一种涌现现象，我们将其命名为临界涌现暗能量模型 CEDE。在 CEDE 中，暗能量出现在过渡红移z _c ，对应于临界现象中的临界温度。结合普朗克 CMB 数据和来自 Riess 等人的哈勃常数的局部测量。（2019 年）我们发现，对于有效代表宇宙学常数的非常早期转变的情况，这种转变具有统计学意义。这是可以理解的，因为 CEDE 模型自然更喜欢与当地测量结果一致的较大的哈勃常数值。由于当我们同时考虑高红移普朗克 CMB 数据和局部哈勃常数测量值时，CEDE 更喜欢非平凡的转变，我们得出结论，H ₀张力可能暗示暗能量的子结构作为关键现象的充分研究属性。但是，如果我们添加 BAO 和 SNe 数据集，那么 CEDE 更喜欢较低的值H ₀ . 这意味着H ₀张力仍然存在，但它比 ΛCDM 的要温和。