11 citations · 28 across the 12 of their papers we have counts for
12 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…
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…
Self-gravitating electromagnetic waves in the dark bubble model
Ulf Danielsson, Daniel Panizo, Vincent Van Hemelryck
We construct embeddings of gravitational and electromagnetic waves in the dark bubble scenario using pp-wave geometries in AdS5, motivated by the fact that pp-wave spacetimes often…
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…
Black Shell Thermodynamics
Ulf Danielsson, Vyshnav Mohan, Larus Thorlacius
Black shells have been proposed as black hole mimickers, i.e. horizonless ultra-compact objects that replace black holes. In this paper, we assume the existence of black shells and…
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…
Charged Nariai black holes on the dark bubble
Ulf Danielsson, Vincent Van Hemelryck
In this paper, we realise the charged Nariai black hole on a braneworld from a nucleated bubble in AdS, known as the dark bubble model. Geometrically, the black hole takes the…
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…
The dark bubbleography
Souvik Banerjee, Ulf Danielsson, Maximilian Zemsch
We present the holographic construction of the dark bubble model of dark energy and highlight the pivotal role played by the non-normalizable modes. Following the route of holograp…
Experimental tests of dark bubble cosmology
Ulf Danielsson, Daniel Panizo
In this paper we use -corrections to the -brane action to obtain a non-zero and positive cosmological constant in the induced cosmology living on the dark bubble. Its…
Shedding light on dark bubble cosmology
Ivano Basile, Ulf Danielsson, Suvendu Giri +1
Dark bubble cosmology is an alternative paradigm to compactification, which can circumvent issues of moduli stabilization and scale separation. In this paper we investigate how ele…
Horizonless black hole mimickers with spin
Ulf Danielsson, Suvendu Giri
In this paper, we study rotating horizon less black shells as an alternative to Kerr black holes. We make use of Ernst's potential to solve the Einstein equations perturbatively in…