Dark Energy by Miao Li, Xiao-Dong Li, Shuang Wang, Yi Wang

By Miao Li, Xiao-Dong Li, Shuang Wang, Yi Wang

This e-book introduces the present nation of study on darkish strength. It involves 3 components. the 1st half is for initial wisdom, together with common relativity, smooth cosmology, and so forth. the second one half studies significant theoretical rules and versions of darkish power. The 3rd half reports a few observational and numerical works. the purpose of this booklet is to supply a enough point of realizing of darkish strength difficulties, in order that the reader can either get conversant in this quarter fast and likewise be ready to take on the medical literature in this topic. it will likely be helpful for graduate scholars and researchers who're drawn to darkish strength.

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We start with a brief history of the dark energy problem in chronological order [3, 15]. 1917 : Einstein added a cosmological constant term in his field equations, for the following reasons: firstly, for isolated mass not to impose a structure on space at infinity in a closed universe; secondly to obtain a static universe [16]. 1920s: Pauli realized that for a radiation field the vacuum energy is too large to gravitate. As we shall review, the vacuum energy density of a radiation field is proportional to the cutoff to the fourth power.

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