基于DESI DR2数据对分数全息暗能量的观测约束
Observational constraints on fractional holographic dark energy in the light of DESI DR2
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中文总结 AI 辅助
该研究基于分数量子力学扩展分数全息暗能量模型，用SN+OHD+DESI DR2等数据集约束模型，发现FHDE_F模型宇宙演化与ΛCDM接近且存在独特晚期动力学，FHDE_H和FHDE_P含CMB先验时被排除。
中文摘要 AI 辅助
基于分数量子力学中的分数熵，已提出以哈勃视界作为红外截断的分数全息暗能量（FHDE_H）模型。我们通过采用未来事件视界和粒子视界作为红外截断扩展该框架，提出了FHDE_F和FHDE_P模型。利用SN+OHD+DESI DR2数据集对这些模型进行约束，我们发现，与ΛCDM模型相比，这三个模型的最小卡方值（χ²_min）略低，但根据AIC和BIC准则，并未表现出显著偏好。当包含宇宙微波背景（CMB）距离先验时，FHDE_H和FHDE_P模型被强烈排除。我们进一步分析了这些模型的宇宙学演化，发现只有FHDE_F模型预测，在整个宇宙历史中，物质密度参数Ω_m和暗能量密度参数Ω_de的演化与ΛCDM模型几乎完全一致，但其减速参数q在未来会偏离ΛCDM模型，表明在标准ΛCDM宇宙学之外存在更丰富的晚期动力学。
英文摘要
Based on the fractional entropy from fractional quantum mechanics, fractional holographic dark energy (FHDE) has been proposed with the Hubble horizon as the IR cutoff (FHDEH). We extend this framework by adopting the future event horizon and the particle horizon as the IR cutoff, proposing the FHDEF and FHDEP models. Using the SN+OHD+DESI DR2 dataset to constrain these models, we find that all three models provide a marginally lower $χ^{2}_{min}$ compared to $Λ$CDM but without significant preference according to AIC and BIC. When CMB distance priors are included, the FHDEH and FHDEP models are strongly ruled out. We further analyze the cosmological evolution for these models, and find that only the FHDEF model predicts nearly identical evolutions of $Ω_{m}$ and $Ω_{de}$ to those of the $Λ$CDM model across cosmic history, but its deceleration parameter $q$ deviate from the $Λ$CDM model in the future, indicating richer late time dynamics beyond the standard $Λ$CDM cosmology.
