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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Phantom-like effects in an asymmetric brane embedding with induced gravity and the Gauss-Bonnet term in the bulk
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Phantom-like effects in an asymmetric brane embedding with induced gravity and the Gauss-Bonnet term in the bulk

机译:不对称麸皮嵌入中的幻影样效应,其具有引力和整体中的高斯-贝内术语

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摘要

We construct an asymmetric braneworld embedding with induced gravity on the brane, where stringy effects are taken into account by the incorporation of the Gauss-Bonnet (GB) term into the bulk action. We derive the effective Friedmann equation of the brane and then investigate possible realization of the phantom-like behavior in this setup. We show that in the absence of the GB term in the bulk action (a pure induced gravity scenario), the phantom-like behavior in the asymmetric case can be realized in smaller redshifts than the corresponding symmetric case. We also show that in the general case with the curvature effect, the phantom-like behavior can be realized in two subcases: in the symmetric subcase and in an asymmetric branch of the solutions. In either case, this phantom-like behavior happens without introducing any phantom fields either on the brane or in the bulk.
机译:我们构造了一个不对称的braneworld,在其上嵌入感应重力,其中通过将高斯-帽子(GB)项合并到整体操作中来考虑严格的影响。我们导出了麸的有效弗里德曼方程,然后研究了在这种情况下幻像行为的可能实现。我们表明,在整体作用(纯感应引力情况)中不存在GB项的情况下,与相应的对称情况相比,在不对称情况下的幻像行为可以在较小的红移中实现。我们还表明,在具有曲率效应的一般情况下,可以在两个子情况下实现幻像行为:在对称子情况下和在解决方案的非对称分支中。在这两种情况下,都不会出现这种类似幻影的行为,而不会在麸皮上或主体中引入任何幻影场。

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