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arXiv 1603.08798gr-qcastro-ph.CO
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具有体粘压的膜上修正的Chaubergin气体膨胀动力学

Dynamics of Modified Chaplygin Gas Inflation on the Brane with Bulk Viscous Pressure

Abdul Jawad, Amara Ilyas, Shamaila Rani

摘要:

在标准标量场存在的情况下,研究了体粘滞压力对膜世界框架下的暖暴胀修正Chaubergin气体的影响。我们假设了强耗散区的中等暴胀情形,构造了暴胀子、势、熵密度、慢滚参数、标量和张量功率谱、标量谱指数和张量-标量比。在高耗散区,我们发展了不同的轨迹,如$n_s - N$,$n_s - r$和$n_s - α_s$(其中$n_s$是谱指数,$α_s$是谱指数的运行,$N$是e-折叠的数目,$r$是张量-标量比),适用于可变和恒定的耗散和体粘滞系数。有趣的是,我们的结果与最近的观测数据,如WMAP $7+9$,BICEP $2$和普朗克数据是兼容的。

英文摘要:

We investigate the role of bulk viscous pressure on the warm inflationary modified Chaplygin gas in brane-world framework in the presence of standard scalar field. We assume the intermediate inflationary scenario in strong dissipative regime and constructed the inflaton, potential, entropy density, slow-roll parameters, scalar and tensor power spectra, scalar spectral index and tensor-to-scalar ratio. We develop various trajectories such as $n_s - N$, $n_s - r$ and $n_s - α_s$ (where $n_s$ is the spectral index, $α_s$ is the running of spectral index, $N$ is the number of e-folds and $r$ is tensor-to-scalar ratio) for variable as well as constant dissipation and bulk viscous coefficients at high dissipative regime. It is interesting to remark here that our results of these parameters are compatible with recent observational data such as WMAP $7+9$, BICEP$2$ and Planck data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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