论文标题
在Horndeski理论之外，热追求稳定的虫洞
In hot pursuit of a stable wormhole in beyond Horndeski theory
论文作者
论文摘要
我们考虑了在超越Horndeski类型的标量调整理论的子类中，在线性化水平上的稳定性问题。在这类理论中，我们得出了一组稳定条件，可确保缺少鬼魂，以及径向和角度梯度的不稳定性，涉及静态，球形对称的背景。这组约束扩展了现有的限制，并完成了奇怪和奇偶校验中高能模式的稳定性分析，甚至“慢”速度不稳定性仍然不受限制。我们举例说明了Horndeski Lagrangian超越虫洞解决方案，该解决方案符合高能量模式的所有稳定性约束。
We consider the issue of stability at the linearized level for static, spherically symmetric wormhole solutions within a subclass of scalar-tensor theories of beyond Horndeski type. In this class of theories we derive a set of stability conditions ensuring the absence of ghosts and both radial and angular gradient instabilities about a static, spherically-symmetric background. This set of constraints extends the existing one and completes the stability analysis for high energy modes in both parity odd and parity even sectors, while "slow" tachyonic instabilities remain unconstrained. We give an example of beyond Horndeski Lagrangian admitting a wormhole solution which complies with all stability constraints for the high energy modes.
