Phantom without ghost
Phantom without ghost
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没有鬼魂的幻影
DOI：
10.1007/s10509-013-1509-z
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发表时间：
2013
影响因子：
1.9
通讯作者：
Emmanuel N. Saridakis
中科院分区：
文献类型：
--
作者：
Shin'ichi Nojiri;Emmanuel N. Saridakis
与之前的分析相比，九年WMAP的结果与其他宇宙学数据相结合，似乎表明了对幻影制度的更大支持。这种行为，除非被未来的观测数据逆转，建议更彻底地考虑幻影政权。在这项工作中，我们提供了三个修改后的引力方案，我们获得幻影实现没有鬼自由度的外观，困扰的问题，即Brans-Dicke型引力，标量爱因斯坦-高斯-邦纳引力，和theF（R）引力，而且没有微扰不稳定性的天真的方法。幻影政权似乎更倾向于引力的修改，而不是宇宙内容的改变。
The Nine-Year WMAP results combined with other cosmological data seem to indicate an enhanced favor for the phantom regime, comparing to previous analyses. This behavior, unless reversed by future observational data, suggests to consider the phantom regime more thoroughly. In this work we provide three modified gravitational scenarios in which we obtain the phantom realization without the appearance of ghosts degrees of freedom, which plague the naive approaches on the subject, namely the Brans-Dicke type gravity, the scalar-Einstein-Gauss-Bonnet gravity, and theF(R) gravity, which are moreover free of perturbative instabilities. The phantom regime seems to favor the gravitational modification instead of the universe-content alteration.