67 citations · 67 across the 2 of their papers we have counts for
3 papers
Optimized numerical evolution of perturbations across sharp background trajectory turns in multifield inflation
Guillermo F. Quispe Peña, Johor D. Peñalba Quispitupa, José T. Gálvez Ghersi
Features in the primordial power spectrum require numerical methods that are both accurate and scalable across the wide class of multifield inflationary models that produce them. S…
Unbraiding the Bounce: Superluminality around the Corner
David A. Dobre, Andrei V. Frolov, José T. Gálvez Ghersi +2
We study a particular realization of the cosmological bounce scenario proposed recently by Ijjas and Steinhardt. First, we find that their bouncing solution starts from a divergent…
Mass inflation and curvature divergence near the central singularity in spherical collapse
Jun-Qi Guo, Pankaj S. Joshi, Jose T. Galvez Ghersi
We study spherical scalar collapse toward a black hole formation and examine the asymptotic dynamics near the central singularity of the formed black hole. It is found that, in the…