论文标题

4d爱因斯坦 - 加斯 - 邦网理论中的可遍历薄壳虫洞

Traversable Thin-shell Wormhole in the 4D Einstein-Gauss-Bonnet Theory

论文作者

Liu, Peng, Niu, Chao, Qian, Wei-Liang, Wang, Xiaobao, Zhang, Cheng-Yong

论文摘要

这项工作研究了四维爱因斯坦 - 加斯 - 邦网理论中球形对称的薄壳虫洞溶液,并探讨了它们在径向线性扰动下的稳定性。这些溶液通常可以遍历,并根据以色列的连接条件按照薄壳喉咙的特征。在渐近平坦和广告空间中,当耦合常数的幅度变得显着时,遇到了负高斯耦合常数的负稳定性,稳定的中性虫洞会遇到。这种虫洞的喉咙由普通物质维持并具有有限的半径。在渐近的DS空间中,未观察到具有普通物质的稳定中性虫洞。另一方面,对于正高孔耦合常数,当喉咙专门​​由外来物质支持时,可以建立稳定的薄壳蠕虫溶液。此外,稳定的充电虫洞由普通物质组成,在渐近平坦,广告和DS空间中普遍发现。与中性的同行不同,这种带电的虫洞的喉咙半径可能很小。但是,随着电荷变得越来越重要,这种解决方案仅在受外来物质支持时保持稳定。

This work investigates the spherically symmetric thin-shell wormhole solutions in four-dimensional Einstein-Gauss-Bonnet theory and explores their stabilities under radial, linear perturbations. These solutions are typically traversable and characterized by a thin-shell throat in accordance with Israel's junction conditions. In asymptotically flat and AdS spacetimes with a negative Gauss-Bonnet coupling constant, stable neutral wormholes are encountered when the magnitude of the coupling constant becomes significant. The throats of such wormholes are sustained by ordinary matter and possess finite radii. In asymptotically dS spacetimes, no stable neutral wormhole featuring ordinary matter is observed. On the other hand, for positive Gauss-Bonnet coupling constant, stable thin-shell wormhole solutions can be established when the throats are exclusively supported by exotic matter. Moreover, stable charged wormholes comprised of ordinary matter are found universally in the asymptotically flat, AdS, and dS spacetimes. Unlike their neutral counterparts, the throat radii of such charged wormholes can be arbitrarily small. However, as the charge becomes more significant, such solutions only remain stable when supported by exotic matter.

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