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9 papers · 1 filter
Branching annihilating random walks with parity conservation on a square lattice
Gyorgy Szabo, Maria Augusta Santos
Using Monte Carlo simulations we have studied the transition from an "active" steady state to an absorbing "inactive" state for two versions of the branching annihilating random wa…
Cosmic strings, loops, and linear growth of matter perturbations
J. H. P. Wu, P. P. Avelino, E. P. S. Shellard +1
We describe the detailed study and results of high-resolution numerical simulations of string-induced structure formation in open universes and those with a non-zero cosmological c…
Ground state instability in systems of strongly interacting fermions
S. A. Artamonov, Yu. G. Pogorelov, V. R. Shaginyan
We analyze stability of a fermion system with model repulsive pair interaction potential. The possibility for different types of restructuring of the Fermi ground state (at suffici…
A parity conserving dimer model with infinitely many absorbing states
M. C. Marques, J. F. F. Mendes
We propose and study a model where, for the first time, two aspects are present: parity conservation and infinitely many absorbing states. Whereas steady-state simulations show tha…
Cosmic string loops and large-scale structure
P. P. Avelino, E. P. S. Shellard, J. H. P. Wu +1
We investigate the contribution made by small loops from a cosmic string network as seeds for large-scale structure formation. We show that cosmic string loops are highly correlate…
The growth of linear perturbations in generic defect models for structure formation
P. P. Avelino, J. P. M. de Carvalho
We study the growth of linear perturbations induced by a generic causal scaling source as a function of the cosmological parameters , and . We show that for waven…