Static Black Binaries in de Sitter
arXiv:2303.07361
Abstract
We construct the first four-dimensional multi-black hole solution of general relativity with a positive cosmological constant. The solution consists of two static black holes whose gravitational attraction is balanced by the cosmic expansion. These static binaries provide the first four-dimensional example of non-uniqueness in general relativity without matter.
15 pages, 8 figures. v2: matches published version (improved discussions and Figs. 6 and 7 added)