1.5k citations · 7.3k across the 100 of their papers we have counts for
7 papers · 1 filter
Non-intercommuting Cosmic Strings
Luis M. A. Bettencourt, Pablo Laguna, Richard A. Matzner
We perform the numerical field evolution for the collision of two Abelian type I cosmic strings. We present evidence that, for collisions at small but characteristic relative veloc…
A Shock-Patching Code for Ultra-Relativistic Fluid Flows
L. Wen, A. Panaitescu, P. Laguna
We have developed a one-dimensional code to solve ultra-relativistic hydrodynamic problems, using the Glimm method for an accurate treatment of shocks and contact discontinuities.…
Telling Tails In The Presence Of A Cosmological Constant
Patrick R. Brady, Chris M. Chambers, William Krivan +1
We study the evolution of massless scalar waves propagating on spherically symmetric spacetimes with a non-zero cosmological constant. Considering test fields on both Schwarzschild…
Cauchy-characteristic Evolution of Einstein-Klein-Gordon Systems: The Black Hole Regime
Philippos Papadopoulos, Pablo Laguna
The Cauchy+characteristic matching (CCM) problem for the scalar wave equation is investigated in the background geometry of a Schwarzschild black hole. Previously reported work dev…
Impact of Relativistic Fireballs on External Matter : Numerical Models of Cosmological Gamma-Ray Bursts
A. Panaitescu, L. Wen, P. Laguna +1
We numerically model the interaction between an expanding fireball and a stationary external medium whose density is either homogeneous or varies with distance as a power-law. The…
Density of kinks after a quench: When symmetry breaks, how big are the pieces?
Pablo Laguna, Wojciech Hubert Zurek
Numerical study of order parameter dynamics in the course of second order (Landau-Ginzburg) symmetry breaking transitions shows that the density of topological defects, kinks, is p…