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arXiv 0902.1994gr-qcastro-ph.CO
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爱因斯坦-罗森桥的径向运动

Radial motion into an Einstein-Rosen bridge

Nikodem J. Poplawski

摘要:

在各向同性坐标系中,考虑了大质量粒子进入黑洞的径向测地线运动,黑洞代表了Einstein-Rosen桥(虫洞)的外部区域。粒子进入内部区域,这是规则的,物理上等价于白洞的渐近平坦的外部,粒子的固有时间延伸到无穷大。由于穿过事件视界后进入虫洞的径向运动与进入史瓦西黑洞的运动在物理上是不同的,爱因斯坦-罗森和史瓦西黑洞是不同的,广义相对论的物理实现。然而,对于遥远的观察者来说,这两种解决方案是无法区分的。我们表明,类时测地线在一个虫洞的领域是完整的,因为在Raychaudhuri方程的扩展标量在地平线上有一个不连续的,因为爱因斯坦-罗森桥是由Kruskal图与Rindler的椭圆形识别的两个对映未来事件视界。这些结果表明,观测到的天体物理学黑洞可能是爱因斯坦-罗森桥,每个黑洞内部都有一个新的宇宙,与黑洞同时形成。因此,我们自己的宇宙可能是存在于另一个宇宙中的黑洞的内部。

英文摘要:

We consider the radial geodesic motion of a massive particle into a black hole in isotropic coordinates, which represents the exterior region of an Einstein-Rosen bridge (wormhole). The particle enters the interior region, which is regular and physically equivalent to the asymptotically flat exterior of a white hole, and the particle's proper time extends to infinity. Since the radial motion into a wormhole after passing the event horizon is physically different from the motion into a Schwarzschild black hole, Einstein-Rosen and Schwarzschild black holes are different, physical realizations of general relativity. Yet for distant observers, both solutions are indistinguishable. We show that timelike geodesics in the field of a wormhole are complete because the expansion scalar in the Raychaudhuri equation has a discontinuity at the horizon, and because the Einstein-Rosen bridge is represented by the Kruskal diagram with Rindler's elliptic identification of the two antipodal future event horizons. These results suggest that observed astrophysical black holes may be Einstein-Rosen bridges, each with a new universe inside that formed simultaneously with the black hole. Accordingly, our own Universe may be the interior of a black hole existing inside another universe.

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