29 citations · 75 across the 4 of their papers we have counts for
4 papers
Cosmological scalar field perturbations can grow
Miguel Alcubierre, Axel de la Macorra, Alberto Diez-Tejedor +1
It has been argued that the small perturbations to the homogeneous and isotropic configurations of a canonical scalar field in an expanding universe do not grow. We show that this…
Cosmological nonlinear structure formation in full general relativity
Jose M. Torres, Miguel Alcubierre, Alberto Diez-Tejedor +1
We perform numerical evolutions of cosmological scenarios using a standard general relativistic code in spherical symmetry. We concentrate on two different situations: initial matt…
Gravitational collapse of charged scalar fields
Jose M. Torres, Miguel Alcubierre
In order to study the gravitational collapse of charged matter we analyze the simple model of an self-gravitating massless scalar field coupled to the electromagnetic field in sphe…
Constraint preserving boundary conditions for the Baumgarte-Shapiro-Shibata-Nakamura formulation in spherical symmetry
Miguel Alcubierre, Jose M. Torres
We introduce a set of constraint preserving boundary conditions for the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) formulation of the Einstein evolution equations in spherical symme…