We investigated the dependence of the spreading critical exponents and the ultimate survival
probability exponent on the initial configuration of a nonequilibrium catalytic reaction
model. The model considers the competitive reactions between two different monomers,
A and
B, where we take into account the energy couplings between nearest neighbor
monomers, and the adsorption energies, as well as the temperature
T of the catalyst.
For each value of T
the model shows distinct absorbing states, with different concentrations of the two
monomers. Employing an epidemic analysis, we established the behavior of the spreading
exponents as we started the Monte Carlo simulations with different concentrations of the
monomers. The exponents were determined as a function of the initial concentration
ρA, ini of
A
monomers. We have also considered initial configurations with correlations for a fixed concentration
of A
monomers. From the determination of three spreading exponents, and the ultimate survival
probability exponent, we checked the validity of the generalized hyperscaling relation for a
continuous set of initial states, random and correlated, which are dependent on the
temperature of the catalyst.