各向异性时空中粘性暗能量的幻影不稳定性
Phantom Instability of Viscous Dark Energy in Anisotropic Space-Time
摘要：
幻影暗能量是一种解释当前观测结果的提议，该观测结果温和地支持暗能量$ω^{de}$的状态方程在68%的置信水平下穿越-1。然而，幻影场通常被紫外量子不稳定性排除。为了克服这种差异，在本文中，我们提出了一种机制，以显示如何在宇宙流体中的体积粘度的存在下，可以暂时驱动流体进入幻影区域（$ω<-1$）。随着时间的推移，体模衰减，最终$ω^{de}$接近-1。然后，我们给出了非粘性和粘性暗能量的这些精粹和幻影描述，并重建了这两个标量场的势。还通过使用状态查找器对$\{s,r\}$对这些模型进行诊断。所有结果都是在各向异性时空中得到的，它是FLRW宇宙的推广。
英文摘要：
Phantom dark energy is a proposal that explains the current observations that mildly favor the equation of state of dark energy $ω^{de}$ crossing -1 at 68% confidence level. However, phantom fields are generally ruled out by ultraviolet quantum instabilities. To overcome this discrepancy, in this paper we propose a mechanism to show that how the presence of bulk viscosity in the cosmic fluid can temporarily drive the fluid into the phantom region ($ω<-1$). As time is going on, phantom decays and ultimately $ω^{de}$ approaches to -1. Then we show these quintessence and phantom descriptions of non-viscous and viscous dark energy and reconstruct the potential of these two scalar fields. Also a diagnostic for these models are performed by using the statefinder pairs $\{s,r\}$. All results are obtained in an anisotropic space-time which is a generalization of FLRW universe.
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。
