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arXiv 2004.00597hep-thgr-qc
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规则黑洞在DHOST理论中的Kerr-Schild构造

Regular black holes via the Kerr-Schild construction in DHOST theories

Eugeny Babichev, Christos Charmousis, Adolfo Cisterna, Mokhtar Hassaine

摘要:

我们将标准的Kerr-Schild解生成方法推广到高阶标量张量理论,这些理论对于标量场是平移不变的。某些简并条件下,至关重要的Ostrogradski鬼的情况下,被认为是需要的有效性的克尔-Schild anomaly,而另一方面,没有宇称对称性的理论被排除在解决方案生成方法。扩展的Kerr-Schild对称性被证明是一个非常有用的工具,可以很容易地从简单的种子结构构造黑洞解。特别是,开发的生成方法适用于构建通用的黑洞,但也经常黑洞解内简并高阶标量张量(DHOST)理论。作为一个特定的例子,我们展示了如何明确地构建海沃德度量作为一个特定的DHOST理论的解决方案。

英文摘要:

We extend the standard Kerr-Schild solution generating method to higher order scalar tensor theories that are shift-invariant for the scalar field. Certain degeneracy conditions, crucial for the absence of Ostrogradski ghosts, are found to be required for the validity of the Kerr-Schild ansatz while on the other hand, theories with no parity symmetry are excluded from the solution generating method. The extended Kerr-Schild symmetry turns out to be a very useful tool to easily construct black hole solutions from simple seed configurations. In particular, the generating method developed is adapted to construct generic black holes but also regular black hole solutions within Degenerate Higher Order Scalar Tensor (DHOST) theories. As a particular example we show how to construct explicitly the Hayward metric as a solution to a specific DHOST theory.

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