Kaniadakis全息暗能量以粒子视界作为红外截断
Kaniadakis Holographic Dark Energy with Particle Horizon as IR Cutoff
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中文总结 AI 辅助
本研究用Kaniadakis熵和粒子视界构建全息暗能量模型，发现无相互作用时即可在z≈0.585实现减速到加速的转变，相互作用仅微调转变时刻，并验证K→0极限恢复标准模型。
中文摘要 AI 辅助
我们利用Kaniadakis熵构建了一个全息暗能量模型，以粒子视界作为红外截断，并一致地修改了全息密度和Friedmann背景。在标准爱因斯坦引力中，无相互作用的粒子视界全息暗能量（HDE）无法产生足够负的压力以实现晚期加速膨胀。我们表明，在保留粒子视界的同时，Kaniadakis变形改变了这一行为。对于代表性参数选择$K=1.90\times10^{-36}$，取$\Omega_{\rm DE0}=0.7$和$c^2=0.64$，在无相互作用情形下，减速参数在$z\simeq0.585$处改变符号。包括相互作用强度$b^2=0.03$和$0.06$仅略微改变转变点，分别给出$z\simeq0.586$和$0.589$。因此，对于此处考虑的参数集，相互作用并不产生加速；相反，转变已经存在于无相互作用的Kaniadakis模型中，相互作用仅对其时间产生微小移动。我们推导了自治演化方程、有效暗能量状态方程和减速参数。还检查了绝热平方声速作为有效流体稳定性的诊断，而statefinder变量用于表征与$\Lambda$CDM的偏差。最后，我们验证了$K\to0$极限连续地恢复标准爱因斯坦引力粒子视界HDE，其中无相互作用模型保持减速。
英文摘要
We construct a holographic dark-energy model using Kaniadakis entropy with the particle horizon as the infrared cutoff, consistently modifying both the holographic density and the Friedmann background. In standard Einstein gravity, noninteracting particle-horizon holographic dark energy (HDE) does not produce the sufficiently negative pressure required for late-time accelerated expansion. We show that the Kaniadakis deformation changes this behavior while the particle horizon is retained. For the representative parameter choice $K=1.90\times10^{-36}$, with $Ω_{\rm DE0}=0.7$ and $c^2=0.64$, the deceleration parameter changes sign at $z\simeq0.585$ in the noninteracting case. Including the interaction strengths $b^2=0.03$ and $0.06$ changes the transition only slightly, giving $z\simeq0.586$ and $0.589$, respectively. Thus, for the parameter set considered here, the interaction does not generate the acceleration; rather, the transition is already present in the noninteracting Kaniadakis model and the interaction produces only a small shift in its timing. We derive the autonomous evolution equations, the effective dark-energy equation of state, and the deceleration parameter. The adiabatic squared sound speed is also examined as a diagnostic of the effective-fluid stability, while statefinder variables are used to characterize deviations from $Λ$CDM. Finally, we verify that the $K\to0$ limit continuously recovers standard Einstein-gravity particle-horizon HDE, for which the noninteracting model remains decelerating.
发表机构
- Shiraz University（设拉子大学）
- Persian Gulf University（波斯湾大学）
机构由 AI 辅助整理，请以论文原文为准。
