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arXiv 2008.09664gr-qcastro-ph.GAastro-ph.HEhep-th
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球对称聚合物黑洞的性质

Properties of the spherically symmetric polymer black holes

Wen-Cong Gan, Nilton O. Santos, Fu-Wen Shu, Anzhong Wang

摘要:

本文系统地研究了一类五参数的球对称聚合物黑洞/白洞解,发现只有三个独立的组合是物理的,并且唯一地决定了时空性质.在探索了整个三维(3D)相空间之后,我们发现该模型具有非常丰富的物理特性,并且根据这些参数的选择,存在各种可能性,包括:(i)具有标准黑洞/白洞结构的时空,即没有时空曲率奇点并具有两个渐近平坦区域的时空,它们通过具有有限且非零几何半径的过渡表面(喉部)连接。观测者在两个渐近平坦区域中测量到的黑/白洞质量都是正的,黑(白)洞的表面引力是正的(负的)。(ii)具有类似虫洞结构的时空,其中两个质量都是正的,但不存在视界。(iii)仍然具有曲率奇点的时空,可以隐藏在捕获区域内或裸露。然而,这样的时空只对应于某些极限情况,必要(但不是充分)条件是两个“聚合”参数中至少有一个为零。此外,即使对于太阳质量的黑洞/白洞,量子引力效应在黑洞/白洞视界仍然非常大,这也取决于参数的选择。

英文摘要:

In this paper we systematically study a five-parameters class of spherically symmetric polymer black/white hole solutions, and find that only three independent combinations are physical and uniquely determine the spacetime properties. After exploring the whole 3-dimensional (3D) phase space, we find that the model has very rich physics, and depending on the choice of these parameters, various possibilities exist, including: (i) spacetimes that have the standard black/white hole structures, that is, spacetimes that are free of spacetime curvature singularities and possess two asymptotically flat regions, which are connected by a transition surface (throat) with a finite and non-zero geometric radius. The black/white hole masses measured by observers in the two asymptotically flat regions are all positive, and the surface gravity of the black (white) hole is positive (negative). (ii) Spacetimes that have wormhole-like structures, in which the two masses are all positive, but no horizons exist.(iii) Spacetimes that still possess curvature singularities, which can be either hidden inside trapped regions or naked. However, such spacetimes correspond to only some limit cases, and the necessary (but not sufficient) condition is that at least one of the two "polymerization" parameters vanishes. In addition, even for solar mass black/white holes, quantum gravitational effects can be still very large at the black/white hole horizons, again depending on the choice of the parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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