6 papers
Quantum nucleation of black hole mimickers via chaos dominated tunneling
Ulf Danielsson, Suvendu Giri, Vyshnav Mohan +1
Black hole mimickers, ultracompact horizonless objects, have been proposed as alternatives to black holes in a variety of settings, including extensions of general relativity and s…
Weak gravity at micron scales from dark bubble cosmology and its cosmological consequences
Ulf Danielsson, Suvendu Giri
The dark bubble model makes a positive cosmological constant natural in string theory, and predicts several new physical phenomena within reach in the near future. In this paper we…
Dark bubbles, dark dimensions and fat gravitons
Ulf Danielsson, Suvendu Giri
The dark bubble model explains the existence of a positive cosmological constant by making explicit use of the instabilities underlying the de Sitter swampland conjectures to make…
Black hole mimickers: from theory to observation
Cosimo Bambi, Ramy Brustein, Vitor Cardoso +16
The black hole paradigm, while remarkably successful, raises fundamental questions-both classical and quantum-about the nature of spacetime, horizons, and singularities. Black hole…
Proving the 6d a-theorem with the double affine Grassmannian
Marco Fazzi, Suvendu Giri, Paul Levy
This paper contains two results of independent interest, the first being more mathematical in nature whereas the second more physical. We first show that the hierarchy of Higgs bra…
Exploring Black Hole Mimickers: Electromagnetic and Gravitational Signatures of AdS Black Shells
Suvendu Giri, Ulf Danielsson, Luis Lehner +1
We study electromagnetic and gravitational properties of AdS black shells (also referred to as AdS black bubbles) -- a class of quantum gravity motivated black hole mimickers, that…