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arXiv 0907.0696gr-qc
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史瓦西黑洞的负能壳效应

The Effect of Negative-Energy Shells on the Schwarzschild Black Hole

Jeffrey S Hazboun, Tevian Dray

摘要:

我们构造了由无质量物质壳层连接的史瓦西时空的彭罗斯图,在这个过程中,我们纠正了德雷和特胡夫特绘制的类似图中的小缺陷,并证实了他们的结果,即这种壳层产生了视界移动。然后,我们考虑具有负能量密度的壳,表明在这种情况下的视界移动允许在史瓦西几何的迄今因果分离的外部区域之间旅行。这些绘图技术,然后用来调查连续壳的属性,加入多个史瓦西区域。同样,负能量壳层的存在导致了外部区域之间的因果联系,甚至在(某些)情况下,两个连续的壳层的总能量相等但相反。

英文摘要:

We construct Penrose diagrams for Schwarzschild spacetimes joined by massless shells of matter, in the process correcting minor flaws in the similar diagrams drawn by Dray and 't Hooft, and confirming their result that such shells generate a horizon shift. We then consider shells with negative energy density, showing that the horizon shift in this case allows for travel between the heretofore causally separated exterior regions of the Schwarzschild geometry. These drawing techniques are then used to investigate the properties of successive shells, joining multiple Schwarzschild regions. Again, the presence of negative-energy shells leads to a causal connection between the exterior regions, even in (some) cases with two successive shells of equal but opposite total energy.

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