arXiv 2204.096902022-04hep-thgr-qc

二元黑洞和黑环中的空泡，反之亦然

Bubbles of nothing in binary black holes and black rings, and viceversa

Marco Astorino, Roberto Emparan, Adriano Viganò

备注：: 23 pages, 11 figures. v2: minor changes (incl in the title); added discussion on Nariai solution as a bubble of nothing. v3: matches published version
发表信息：: JHEP07(2022)007
DOI：: 10.1007/JHEP07(2022)007

摘要：

我们认为，膨胀的空泡是一个普遍的特点，黑洞系统的多个或非球形的视野，出现作为一个限制的区域，被狭隘的视野。气泡是连接系统中爱因斯坦-罗森桥的最小循环，它的膨胀是通过黑洞内部熟悉的空间拉伸发生的。我们证明了这个想法（不涉及任何威克旋转）与明确的建设在四，五个维度。在这些维度中膨胀气泡的几何形状分别是静态黑洞双星和黑环的极限。这个极限使得两个黑洞或黑环内孔之间的距离变得非常小，并且黑洞的视界对应于气泡的加速视界。我们还解释了一个五维的黑洞双星如何产生一种不同类型的膨胀气泡。然后，我们表明，泡沫时空可以主机黑洞双星和黑环在静力平衡，与他们的引力被平衡对背景时空膨胀。在六维或更多维中，类似的结构是可以预期的，但这些解决方案中的大多数只能通过数值计算来获得。最后，我们认为，Nariai解决方案可以被视为包含一个不断扩大的圆形泡沫没有。

英文摘要：

We argue that expanding bubbles of nothing are a widespread feature of systems of black holes with multiple or non-spherical horizons, appearing as a limit of regions that are narrowly enclosed by the horizons. The bubble is a minimal cycle that links the Einstein-Rosen bridges in the system, and its expansion occurs through the familiar stretching of space in black hole interiors. We demonstrate this idea (which does not involve any Wick rotations) with explicit constructions in four and five dimensions. The geometries of expanding bubbles in these dimensions arise as a limit of, respectively, static black hole binaries and black rings. The limit is such that the separation between the two black holes, or the inner hole of the black ring, becomes very small, and the horizons of the black holes correspond to acceleration horizons of the bubbles. We also explain how a five-dimensional black hole binary gives rise to a different type of expanding bubble. We then show that bubble spacetimes can host black hole binaries and black rings in static equilibrium, with their gravitational attraction being balanced against the background spacetime expansion. Similar constructions are expected in six or more dimensions, but most of these solutions can be obtained only numerically. Finally, we argue that the Nariai solution can be regarded as containing an expanding circular bubble of nothing.

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英文摘要：

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