Effective equation of state and energy conditions in phantom/tachyon inflationary cosmology perturbed by quantum effects
Effective equation of state and energy conditions in phantom/tachyon inflationary cosmology perturbed by quantum effects
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DOI：
10.1016/j.physletb.2003.08.013
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发表时间：
2003-06
影响因子：
4.4
通讯作者：
S. Nojiri;S. Odintsov
中科院分区：
文献类型：
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作者：
S. Nojiri;S. Odintsov
讨论了由可能具有负动能的快子加标量幻影加共形量子物质组成的模型。结果表明，该模型自然存在两个de Sitter阶段，即早期宇宙膨胀是由量子效应引起的，晚期加速宇宙是由幻影/快子引起的.导出了这种宇宙学的能量条件界。有趣的是，有效的状态方程可能会改变它的符号，这取决于幻影/快子和量子效应的组合的适当选择。
We discuss the model consisting of tachyon which may have the negative kinetic energy plus scalar phantom and plus conformal quantum matter. It is demonstrated that such a model naturally admits two de Sitter phases where the early universe inflation is produced by quantum effects and the late time accelerating universe is caused by phantom/tachyon. The energy conditions bounds for such cosmology are derived. It is interesting that effective equation of state may change its sign what depends from the proper choice of the combination of phantom/tachyon and quantum effects.