Abstract

We consider gravitational collapse of a spherically symmetric sphere of a fluid with spin and torsion into a black hole. We use the Tolman metric and the Einstein–Cartan field equations with a relativistic spin fluid as a source. We show that gravitational repulsion of torsion prevents a singularity and replaces it with a nonsingular bounce. Quantum particle production during contraction helps torsion to dominate over shear. Particle production during expansion can generate a finite period of inflation and produce enormous amounts of matter. The resulting closed universe on the other side of the event horizon may have several bounces. Such a universe is oscillatory, with each cycle larger in size then the previous cycle, until it reaches the cosmological size and expands indefinitely. Our universe might have therefore originated from a black hole.

中文翻译：

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引力作用下的流体在黑洞中的扭转塌陷成宇宙

摘要

我们考虑了自旋和扭转成黑洞的流体的球形对称球体的重力塌陷。我们使用相对论性自旋流体作为源的Tolman度量和Einstein-Cartan场方程。我们表明，重力的扭转斥力可防止出现奇异性，并用非奇异的弹跳代替它。收缩过程中产生的量子粒子有助于扭转力在剪切力中占主导地位。膨胀过程中产生的颗粒会产生有限的膨胀期，并产生大量的物质。事件视界另一端的封闭宇宙可能会反弹几次。这样的宇宙是振荡的，每个周期的大小都比前一个周期大，直到达到宇宙学大小并无限扩展。因此，我们的宇宙可能起源于一个黑洞。