60 citations · 424 across the 16 of their papers we have counts for
11 papers · 1 filter
Superradiant scattering in fluids of light
Angus Prain, Calum Maitland, Daniele Faccio +1
We theoretically investigate the scattering process of Bogoliubov excitations on a rotating photon-fluid. Using the language of Noether currents we demonstrate the occurrence of a…
Understanding dynamical black hole apparent horizons
Valerio Faraoni, Angus Prain
Dynamical, non-asymptotically flat black holes are best characterized by their apparent horizons. Cosmological black hole solutions of General Relativity exhibit two types of appar…
Turnaround radius in an accelerated universe with quasi-local mass
Valerio Faraoni, Marianne Lapierre-Léonard, Angus Prain
We apply the Hawking-Hayward quasi-local energy construct to obtain in a rigorous way the turnaround radius of cosmic structures in General Relativity. A splitting of this quasi-lo…
Black holes and wormholes subject to conformal mappings
Valerio Faraoni, Angus Prain, Andres F. Zambrano Moreno
Solutions of the field equations of theories of gravity which admit distinct conformal frame representations can look very different in these frames. We show that Brans class IV so…
Do Newtonian large-scale structure simulations fail to include relativistic effects?
Valerio Faraoni, Marianne Lapierre-Leonard, Angus Prain
The Newtonian simulations describing the formation of large-scale structures do not include relativistic effects. A new approach to this problem is proposed, which consists of spli…
Hawking-Hayward quasi-local energy under conformal transformations
Angus Prain, Vincenzo Vitagliano, Valerio Faraoni +1
We derive a formula describing the transformation of the Hawking-Hayward quasi-local energy under a conformal rescaling of the spacetime metric. A known formula for the transformat…
Rotating black holes in a draining bathtub: superradiant scattering of gravity waves
Mauricio Richartz, Angus Prain, Stefano Liberati +1
In a draining rotating fluid flow background, surface perturbations behave as a scalar field on a rotating effective black hole spacetime. We propose a new model for the background…
The charged McVittie spacetime
Valerio Faraoni, Andres F. Zambrano Moreno, Angus Prain
The two-parameter charged McVittie solution of the Einstein equations is revisited and its apparent horizons are discussed and located numerically (for the extremal case, analytica…
Superradiant scattering of dispersive fields
Maurício Richartz, Angus Prain, Silke Weinfurtner +1
Motivated by analogue models of classical and quantum field theory in curved spacetimes and their recent experimental realizations, we consider wave scattering processes of dispers…
Quantum vacuum radiation in optical glass
Stefano Liberati, Angus Prain, Matt Visser
A recent experimental claim of the detection of analogue Hawking radiation in an optical system [PRL 105 (2010) 203901] has led to some controversy [PRL 107 (2011) 149401, 149402].…
Analogue Cosmological Particle Creation: Quantum Correlations in Expanding Bose Einstein Condensates
Angus Prain, Serena Fagnocchi, Stefano Liberati
We investigate the structure of quantum correlations in an expanding Bose Einstein Condensate (BEC) through the analogue gravity framework. We consider both a 3+1 isotropically exp…