6 papers · 1 filter
Tunnelling across a trapped region and out of a black hole
Edward Wilson-Ewing
The quantum field theory for a massless scalar field on a two-dimensional non-singular black hole spacetime gives a non-vanishing probability for a particle to tunnel out of the bl…
Relational Observables in Group Field Theory
Luca Marchetti, Edward Wilson-Ewing
We construct relational observables in group field theory (GFT) in terms of covariant positive operator-valued measures (POVMs), using techniques developed in the context of quantu…
Dynamical homogenization in effective loop quantum cosmology
Edward Wilson-Ewing
The effective dynamics of loop quantum gravity for marginally bound Lemaître-Tolman-Bondi spacetimes predict that the big-bang singularity is resolved and replaced by a cosmic bou…
Static Planck stars from effective loop quantum gravity
Edward Wilson-Ewing
Effective loop quantum gravity dynamics are derived for spherically symmetric spacetimes with a perfect fluid matter content. For homogeneous spacetimes, the effective dynamics agr…
Gravitational collapse in effective loop quantum gravity: beyond marginally bound configurations
Lorenzo Cipriani, Francesco Fazzini, Edward Wilson-Ewing
We study gravitational collapse in effective loop quantum gravity, focusing on non-marginally bound configurations in Lemaître-Tolman-Bondi spacetimes. In the homogeneous limit we…
Shell-crossings and shock formation during gravitational collapse in effective loop quantum gravity
Francesco Fazzini, Viqar Husain, Edward Wilson-Ewing
Effective models of gravitational collapse in loop quantum gravity for the Lemaître-Tolman-Bondi spacetime predict that collapsing matter reaches a maximum finite density, bounces…