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arXiv 0811.1286gr-qcastro-phhep-th
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关于广义Gauss-Bonnet暗能量的注记

Remarks on generalized Gauss-Bonnet dark energy

M. Alimohammadi, A. Ghalee

摘要:

考虑了F(R,G)拉格朗日量的修正引力,G是Gauss-Bonnet不变量。结果表明,在这些模型中普遍存在着幻影分界线交叉和减速到加速的过渡。我们的结果与已知的f(R)-引力和f(G)-引力模型的结果一致.计算了量子效应对这些跃迁的贡献,并指出在某些特殊情况下,当经典能级没有跃迁时,量子效应可以诱导跃迁。通过共形反常描述了量子效应。

英文摘要:

The modified gravity with F(R,G) Lagrangian, G is the Gauss-Bonnet invariant, is considered. It is shown that the phantom-divide-line crossing and the deceleration to acceleration transition generally occur in these models. Our results coincide with the known results of f(R)-gravity and f(G)-gravity models. The contribution of quantum effects to these transitions is calculated, and it is shown that in some special cases where there are no transitions in classical level, quantum contributions can induce transitions. The quantum effects are described via the account of conformal anomaly.

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