具有体粘滞的Friedmann宇宙学：暗能量的具体模型
Friedmann cosmology with bulk viscosity: a concrete model for dark energy
摘要：
宇宙内容物被认为是一种具有体粘滞性的非理想流体，可以用一般的状态方程来描述（与传统假设的宇宙理想流体模型有一定的偏差）。通过统计分析，提出了一个显式体粘滞暗能量模型，该模型与现有的观测数据一致，并通过减速参数的比较，表明该模型与协调的$Λ$冷暗物质（CDM）模型一致（偏离不大）.同时，通过与$Λ$ CDM模型的对比，我们将相对简单的粘性暗能量模型与一个更复杂的模型进行了比较，发现我们的模型在粘性暗能量模型的建立方面有所改进。最后，我们讨论了未来几年的观测暗能量探测的前景。
英文摘要：
The universe content is considered as a non-perfect fluid with bulk viscosity and can be described by a general equation of state (endowed some deviation from the conventionally assumed cosmic perfect fluid model). An explicitly bulk viscosity dark energy model is proposed to confront consistently with the current observational data sets by statistical analysis and is shown consistent with (not deviated away much from) the concordant $Λ$ Cold Dark Matter (CDM) model by comparing the decelerating parameter. Also we compare our relatively simple viscosity dark energy model with a more complicated one by contrast with the concordant $Λ$CDM model and find our model improves for the viscosity dark energy model building. Finally we discuss the perspectives of dark energy probes for the coming years with observations.
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