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arXiv 1304.5992gr-qchep-th
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大质量引力中黑洞的不稳定性

Instability of black holes in massive gravity

Eugeny Babichev, Alessandro Fabbri

摘要:

我们发现,大质量双引力理论的最简单的黑洞解,双史瓦西解,周围的线性扰动,表现出不稳定的模式,具有格雷戈里-Laflamme不稳定性的高维黑弦。这个结果是在不受Boulware-Deser鬼影响的大质量引力理论中得到的,也是在它的两个动力学度规的推广中得到的。这些结果可能表明,在大质量引力中静态的黑洞是不存在的。然而,对于哈勃尺度量级的引力子质量,不稳定时间尺度是哈勃时间的量级。

英文摘要:

We show that linear perturbations around the simplest black hole solution of massive bi-gravity theories, the bi-Schwarzschild solution, exhibit an unstable mode featuring the Gregory-Laflamme instability of higher-dimensional black strings. The result is obtained for the massive gravity theory which is free from the Boulware-Deser ghost, as well as for its extension with two dynamical metrics. These results may indicate that static black holes in massive gravity do not exist. For graviton mass of order of Hubble scale, however, the instability timescale is of order of the Hubble time.

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