63 citations · 196 across the 10 of their papers we have counts for
10 papers
Quantum correlations in a gravitational collapse simulation with SpheriCo.jl
Benjamin Berczi, Magdalena Eriksson, Thanasis Giannakopoulos +1
We report on work using a newly developed code, SpheriCo.jl, that computes the gravitational collapse of a spherical scalar field, where the scalar can be either a classical field,…
Characteristic formulations of general relativity and applications
Thanasis Giannakopoulos
General relativity can describe various gravitational systems of astrophysical relevance, like black holes and neutron stars, or even strongly coupled systems through the holograph…
Numerical convergence of model Cauchy-characteristic extraction and matching
Thanasis Giannakopoulos, Nigel T. Bishop, David Hilditch +2
Gravitational waves provide a powerful enhancement to our understanding of fundamental physics. To make the most of their detection we need to accurately model the entire process o…
Holographic Bubbles with Jecco: Expanding, Collapsing and Critical
Yago Bea, Jorge Casalderrey-Solana, Thanasis Giannakopoulos +4
Cosmological phase transitions can proceed via the nucleation of bubbles that subsequently expand and collide. The resulting gravitational wave spectrum depends crucially on the pr…
Spinodal Gravitational Waves
Yago Bea, Jorge Casalderrey-Solana, Thanasis Giannakopoulos +5
We uncover a new gravitational-wave production mechanism in cosmological, first-order, thermal phase transitions. These are usually assumed to proceed via the nucleation of bubbles…
Domain Collisions
Yago Bea, Jorge Casalderrey-Solana, Thanasis Giannakopoulos +3
We use holography to study collisions of phase domains formed in a four-dimensional, strongly-coupled gauge theory with a first-order, thermal phase transition. We find three quali…
Gauge structure of the Einstein field equations in Bondi-like coordinates
Thanasis Giannakopoulos, Nigel T. Bishop, David Hilditch +2
The characteristic initial (boundary) value problem has numerous applications in general relativity (GR) involving numerical studies, and is often formulated using Bondi-like coord…
Bubble Wall Velocity from Holography
Yago Bea, Jorge Casalderrey-Solana, Thanasis Giannakopoulos +3
Cosmological phase transitions proceed via the nucleation of bubbles that subsequently expand and collide. The resulting gravitational wave spectrum depends crucially on the bubble…
Crossing a large- phase transition at finite volume
Yago Bea, Oscar J. C. Dias, Thanasis Giannakopoulos +4
The existence of phase-separated states is an essential feature of infinite-volume systems with a thermal, first-order phase transition. At energies between those at which the phas…
Hyperbolicity of General Relativity in Bondi-like gauges
Thanasis Giannakopoulos, David Hilditch, Miguel Zilhao
Bondi-like (single-null) characteristic formulations of general relativity are used for numerical work in both asymptotically flat and anti-de Sitter spacetimes. Well-posedness of…