The dark energy from virtual gravitons is consistent with observational data on supernovas with the same accuracy as the ΛCDM model. The fact that virtual gravitons are capable of producing a de Sitter accelerated expansion of the FLRW universe was established in 2008 (see references). The combination of conformal non-invariance with zero rest mass of gravitons (unique properties of the gravitational field) leads to the appearance of graviton dark energy in a mater-dominated era; this fact explains the relatively recent appearance of the dark energy and answers the question “Why now?”. The transition redshifts (where deceleration is replaced by acceleration) that follow from the graviton theory are consistent with model-independent transition redshifts derived from observational data. Prospects for testing the GCDM model (the graviton model of dark energy where G stands for gravitons) and comparison with the ΛCDM model are discussed.

中文翻译：

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来自虚拟引力子的暗能量（GCDM 模型与 ΛCDM 模型）

来自虚拟引力子的暗能量与超新星观测数据一致，精度与 ΛCDM 模型相同。虚拟引力子能够产生 FLRW 宇宙的德西特加速膨胀这一事实于 2008 年确立（参见参考资料）。共形不变性与引力子静止质量为零（引力场的独特性质）相结合，导致了物质主导时代引力子暗能量的出现；这一事实解释了暗能量相对较新的出现，并回答了“为什么是现在？”的问题。引力子理论得出的过渡红移（其中减速被加速取代）与源自观测数据的与模型无关的过渡红移一致。