New Cosmological Solutions in Massive Gravity
New Cosmological Solutions in Massive Gravity
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DOI：
10.1103/physrevd.86.061505
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发表时间：
2012-05
影响因子：
5
通讯作者：
Tsutomu Kobayashi;M. Siino;Masahide Yamaguchi;Daisuke Yoshida
中科院分区：
文献类型：
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作者：
Tsutomu Kobayashi;M. Siino;Masahide Yamaguchi;Daisuke Yoshida
我们找到了新的、简单的宇宙学解决方案，具有平坦、开放和封闭的空间几何形状，与之前认为只允许开放模型的看法相反。在通常的Friedmann-Lema-Robertson-Walker坐标下，给出了度规和ST“{u}ck elberg场的非平凡位形.解决方案表现出自我加速，同时没有幽灵不稳定。我们的解也能适应以Lema-Tolman-Bondi度规为代表的非均匀尘埃塌陷。因此，我们的结果不仅可以用来描述均匀各向同性的宇宙学，而且还可以用来研究质量引力中的引力坍缩。
We find new, simple cosmological solutions with flat, open, and closed spatial geometries, contrary to the previous wisdom that only the open model is allowed. The metric and the St\"{u}ckelberg fields are given explicitly, showing nontrivial configurations of the St\"{u}ckelberg in the usual Friedmann-Lema\^{i}tre-Robertson-Walker coordinates. The solutions exhibit self-acceleration, while being free from ghost instabilities. Our solutions can accommodate inhomogeneous dust collapse represented by the Lema\^{i}tre-Tolman-Bondi metric as well. Thus, our results can be used not only to describe homogeneous and isotropic cosmology but also to study gravitational collapse in massive gravity.