Cosmological solutions for a model with a 1/H2 term
Cosmological solutions for a model with a 1/H2 term
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DOI：
10.1088/1475-7516/2007/03/009
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发表时间：
2006-11
影响因子：
6.4
通讯作者：
Masato Ito
中科院分区：
文献类型：
--
作者：
Masato Ito
我们导出了一个具有1/H2项的五维模型（H2 <$HMNPQHMNPQ）的宇宙学解，其中HMNPQ是4型场强度.考察了有效理论中标度因子和标度势的行为。我们表明，作为一个结果，宇宙的变化，从显示减速膨胀，以显示在爱因斯坦框架的四维理论加速膨胀。
We derive the cosmological solutions of a five-dimensional model with a 1/H2 term (H2 ≡ HMNPQHMNPQ), where HMNPQ is the 4-form field strength. The behaviours of the scale factors and the scalar potential in the effective theory are examined. We show that, as a consequence, the universe changes from showing decelerated expansion to showing accelerated expansion in the Einstein frame of the four-dimensional theory.