40 citations · 97 across the 5 of their papers we have counts for
5 papers
Fast and Slow Coherent Cascades in Anti-de Sitter Spacetime
Fotios V. Dimitrakopoulos, Ben Freivogel, Juan F. Pedraza
We study the phase and amplitude dynamics of small perturbations in 3+1 dimensional Anti-de Sitter spacetime using the truncated resonant approximation, also known as the Two Time…
Gauge dependence of the AdS instability problem
Fotios V. Dimitrakopoulos, Ben Freivogel, Juan F. Pedraza +1
Previous work on the AdS instability problem within the two-time framework (TTF) has found an "oscillating singularity" whose presence depends on the gauge choice. We give a physic…
Conditionally Extended Validity of Perturbation Theory: Persistence of AdS Stability Islands
Fotios Dimitrakopoulos, I-Sheng Yang
Approximating nonlinear dynamics with a truncated perturbative expan- sion may be accurate for a while, but it in general breaks down at a long time scale that is one over the smal…
Vacua and correlators in hyperbolic de Sitter space
Fotios V. Dimitrakopoulos, Laurens Kabir, Benjamin Mosk +2
We study the power - and bi -spectrum of vacuum fluctuations in a hyperbolic section of de Sitter space, comparing two states of physical interest: the Bunch-Davies and hyperbolic…
Position space analysis of the AdS (in)stability problem
Fotios V. Dimitrakopoulos, Ben Freivogel, Matthew Lippert +1
We investigate whether arbitrarily small perturbations in global AdS space are generically unstable and collapse into black holes on the time scale set by gravitational interaction…