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Tuesday, August 19th, 2025
Special Lecture by Jorge Santos
Time: 2:00 PM - 3:00 PM
Location: SCGP 313
Title: Gravity Beyond Astrophysics: Static Black Binaries in de Sitter - Case Study
Abstract: My objective is to ignite curiosity in the realm of general relativity, pushing its boundaries beyond the typical applications in astrophysics. To illustrate this, I will present a case study: the construction of the first four-dimensional multi-black hole solution in general relativity, featuring a positive cosmological constant. This curious solution consists of two static black holes whose gravitational forces are counteracted by the cosmic expansion. These static binaries showcase non-uniqueness within general relativity without the presence of matter, serving as a novel four-dimensional counterexample to black hole uniqueness theorems. To conclude, I will briefly explore the potential implications of our findings for quantum gravity.
Title: Gravity Beyond Astrophysics: Static Black Binaries in de Sitter - Case Study
Abstract: My objective is to ignite curiosity in the realm of general relativity, pushing its boundaries beyond the typical applications in astrophysics. To illustrate this, I will present a case study: the construction of the first four-dimensional multi-black hole solution in general relativity, featuring a positive cosmological constant. This curious solution consists of two static black holes whose gravitational forces are counteracted by the cosmic expansion. These static binaries showcase non-uniqueness within general relativity without the presence of matter, serving as a novel four-dimensional counterexample to black hole uniqueness theorems. To conclude, I will briefly explore the potential implications of our findings for quantum gravity.