We consider the stationary spherical accretion process of perfect fluids onto a class of spherically symmetric regular black holes corresponding to quantum-corrected Schwarzschild spacetimes. We show that the accretion rates can differ from the Schwarzschild case, suggesting that the de Sitter core inside these regular black holes, which indeed precludes the central singularity, can act for some cases as a sort of antigravitational source, decreasing the fluid's radial infall velocity in the accretion process, and for others as a gravitational enhancer, increasing the fluid flow into the black hole horizon. Our analysis and results can be extended and applied also to the problem of black hole evaporation in cosmological scenarios with phantom fluids. In particular, we show that the mass of typical regular black holes could be used to constrain turnaround events in cyclic cosmologies.

中文翻译：

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完美流体吸积到一类规则黑洞上

我们考虑了完美流体在一类球对称规则黑洞上的稳态球形吸积过程，该黑洞对应于量子校正的施瓦西时空。我们表明吸积率可能与 Schwarzschild 情况不同，这表明这些规则黑洞内的 de Sitter 核心确实排除了中心奇点，在某些情况下可以作为一种反重力源，降低流体的径向入射速度在吸积过程中，对于其他人来说，作为引力增强剂，增加了进入黑洞视界的流体。我们的分析和结果可以扩展并应用于具有幻影流体的宇宙学场景中的黑洞蒸发问题。特别是，