Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Numerical study of persistence in systems with absorbing states   Extensive Monte Carlo simulations are performed in order to evaluate both the
local ($\theta_{l}$) and global ($\theta_{g}$) persistence exponents in the
Ziff-Gulari-Barshad (ZGB) (Phy. Rev. Lett. {\bf 56}, 2553, (1986)) irreversible
reaction model. In two dimensions and for the second-order irreversible phase
transition (IPT) we find, that both the local and the global persistence
exhibit power-law behavior with a crossover between two different time regimes.
On the other hand, at the first-order IPT, characteristic of the ZGB, active
sites are short lived and the persistence decays more abruptly, not being clear
whether it shows power law behavior or not. In order to analyze universality
issues, we have also studied another model with absorbing states, the contact
process, and evaluated the local persistence exponent in dimensions from 1 to
4. A striking apparent {\it super-universality} is reported: the local
persistence exponent seems to coincide in both one and two dimensional systems.

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The categories of this paper are: q-bio
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The categories of this paper are: stat
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex