176 citations · 3.9k across the 153 of their papers we have counts for
6 papers · 1 filter
Cosmological black holes from self-gravitating fields
Elcio Abdalla, Niayesh Afshordi, Michele Fontanini +2
Both cosmological expansion and black holes are ubiquitous features of our observable Universe, yet exact solutions connecting the two have remained elusive. To this end, we study…
Four-Dimensional Asymptotically AdS Black Holes with Scalar Hair
P. A. Gonzalez, Eleftherios Papantonopoulos, Joel Saavedra +1
We present a new family of asymptotically AdS four-dimensional black hole solutions with scalar hair of a gravitating system consisting of a scalar field minimally coupled to gravi…
Phase Transition to a Hairy Black Hole in Asymptotically Flat Spacetime
Theodoros Kolyvaris, George Koutsoumbas, Eleftherios Papantonopoulos +1
We discuss a phase transition of a Reissner-Nordström black hole to a hairy black hole in asymptotically flat spacetime. The hair is due to a massive charged scalar field. The no-h…
Gravitational Particle Production in Gravity Theories with Non-minimal Derivative Couplings
George Koutsoumbas, Konstantinos Ntrekis, Eleftherios Papantonopoulos
We study the gravitational production of heavy X-particles of mass of the order of the inflaton mass, produced after the end of inflation. We find that, in the presence of a deriva…
Spontaneously Generated Inhomogeneous Phases via Holography
James Alsup, Eleftherios Papantonopoulos, George Siopsis +1
We discuss a holographic model consisting of a gauge field and a scalar field coupled to a charged AdS black hole under a spatially homogeneous chemical potential. By turnin…
Building a Holographic Superconductor with Higher-derivative Couplings
Xiao-Mei Kuang, Eleftherios Papantonopoulos, George Siopsis +1
We discuss the gravitational dual of a holographic superconductor consisting of a U(1) gauge field, a complex scalar field coupled to a charged AdS black hole and a higher-derivati…