Towards wormhole beyond Horndeski
Towards wormhole beyond Horndeski
复制标题
DOI：
10.1051/epjconf/201819107014
复制
发表时间：
2018-11
期刊：
影响因子：
--
通讯作者：
S. Mironov;V. Rubakov;V. Rubakov;V. Volkova;V. Volkova
中科院分区：
文献类型：
--
作者：
S. Mironov;V. Rubakov;V. Rubakov;V. Volkova;V. Volkova
我们解决的问题是，静态的，球对称的虫洞，证明在Horndeski理论的不去定理，可以绕过超越Horndeski。我们证明，作为不通过定理核心的幽灵不稳定性确实可以避免。然而，具有后一种性质的虫洞解是强烈微调的，因此它们很可能是不稳定的。此外，目前还不清楚这些解决方案是否有其他的病理，如梯度不稳定性沿着角和径向方向。
We address the issue of whether a no-go theorem for static, spherically symmetric wormholes, proven in Horndeski theories, can be circumvented by going beyond Horndeski. We show that the ghost instabilities which are at the heart of the no-go theorem, can indeed be avoided. The wormhole solutions with the latter property are, however, strongly fine tuned, and hence it is likely that they are unstable. Furthermore, it remains unclear whether these solutions have other pathologies, like gradient instabilities along angular and radial directions.