Dark energy due to effective quantum field theory
Dark energy due to effective quantum field theory
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DOI：
10.1016/j.physletb.2008.03.044
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发表时间：
2007-12
影响因子：
4.4
通讯作者：
M. Maziashvili
中科院分区：
文献类型：
--
作者：
M. Maziashvili
在宇宙学背景下，描述宇宙中可见物质行为的有效量子场论以其固有的紫外线截止和由宇宙学（粒子）视界设定的红外尺度为特征。这种紫外-红外关系自然地定义了地平线尺度上的时空网格。使用通过时空不确定性关系与时空网格来确定暗能量的方法，我们估计了由这种紫外-红外关系定义的暗能量的能量密度和压力。这种暗能量随着时间线性衰减，并且直到最近才表现出负压。
In the cosmological context an effective quantum field theory describing the behavior of visible matter in the Universe is characterized with its inherent UV cutoff and also with an IR scale that is set by the cosmological (particle) horizon. This UV–IR relation naturally defines a space–time grid over a horizon scale. Using the approach for determining of dark energy through the space–time uncertainty relation versus such a space–time grid, we estimate the energy density and pressure of a dark energy defined by this UV–IR relation. Such a dark energy shows up to decay linearly with time and exhibits a negative pressure only recently.