Unlike generic models of regular black holes (BHs) with nonzero surface gravity on both Cauchy and event horizons, an inner-degenerate counterpart with zero Cauchy horizon surface gravity was recently proposed. For this regular BH solution with spherical symmetry, we examine the stability of the Cauchy horizon from both classic and quantum mechanics viewpoints. We find that the classical perturbations do not lead to mass inflation at the Cauchy horizon, indicating classically stability, while quantum fluctuations cause it to be unstable quantum mechanically.

中文翻译：

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关于无质量膨胀的常规黑洞中柯西视界稳定性的注解


与柯西视界和事件视界上均具有非零表面重力的常规黑洞（BH）的一般模型不同，最近提出了柯西视界表面重力为零的内简并对应模型。对于这个具有球对称性的正则 BH 解，我们从经典力学和量子力学的角度检验了柯西视界的稳定性。我们发现经典扰动不会导致柯西视界处的质量膨胀，这表明经典稳定性，而量子涨落导致其在量子力学上不稳定。