QCD鬼f（T）引力模型
QCD ghost f(T)-gravity model
摘要：
在修正的遥平行引力理论框架下，我们重建了一个对应于QCD鬼暗能量的f（T）模型。对于一个只包含无压物质的空间平坦的FRW宇宙，我们得到了挠率标量T（或哈勃参数）的时间演化。然后，我们计算了QCD鬼f（T）-引力模型的有效挠率方程的状态参数以及宇宙的减速参数。此外，我们还利用最新的观测数据（包括SNeIa、CMB和BAO数据）拟合了模型参数。我们还使用宇宙学分析方法检查我们的模型的可行性。此外，我们调查的有效性广义第二定律（GSL）的引力热力学模型。最后指出了物质密度微扰的增长率。我们的结论是，在QCD鬼f（T）-引力模型中，宇宙开始了一个物质主导的阶段，并在后期接近德西特制度，正如预期的那样。该模型与现有数据一致，通过了宇宙学检验，满足GSL要求，与LCDM模型一样能很好地拟合生长因子数据。
英文摘要：
Within the framework of modified teleparallel gravity, we reconstruct a f(T) model corresponding to the QCD ghost dark energy scenario. For a spatially flat FRW universe containing only the pressureless matter, we obtain the time evolution of the torsion scalar T (or the Hubble parameter). Then, we calculate the effective torsion equation of state parameter of the QCD ghost f(T)-gravity model as well as the deceleration parameter of the universe. Furthermore, we fit the model parameters by using the latest observational data including SNeIa, CMB and BAO data. We also check the viability of our model using a cosmographic analysis approach. Moreover, we investigate the validity of the generalized second law (GSL) of gravitational thermodynamics for our model. Finally, we point out the growth rate of matter density perturbation. We conclude that in QCD ghost f(T)-gravity model, the universe begins a matter dominated phase and approaches a de Sitter regime at late times, as expected. Also this model is consistent with current data, passes the cosmographic test, satisfies the GSL and fits the data of the growth factor well as the LCDM model.
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