Static Black Binaries in de Sitter Space

Phys Rev Lett. 2023 Sep 29;131(13):131401. doi: 10.1103/PhysRevLett.131.131401.

Abstract

We construct the first four-dimensional multiple 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 nonuniqueness in general relativity without matter.