How to discriminate easily between directed-percolation and Manna scaling

Juan A. Bonachela, Miguel A. Muñoz

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


Here we compare critical properties of systems in the directed-percolation (DP) universality class with those of absorbing-state phase transitions occurring in the presence of a non-diffusive conserved field, i.e., transitions in the so-called Manna or C-DP class. Even if it is clearly established that these constitute two different universality classes, most of their universal features (exponents, moment ratios, scaling functions,...) are very similar, making it difficult to discriminate numerically between them. Nevertheless, as illustrated here, the two classes behave in a rather different way upon introducing a physical boundary or wall. Taking advantage of this, we propose a simple and fast method to discriminate between these two universality classes. This is particularly helpful in solving some existing discrepancies in self-organized critical systems as sandpiles.

Original languageEnglish
Pages (from-to)89-93
Number of pages5
JournalPhysica A: Statistical Mechanics and its Applications
Issue number1
Early online date8 May 2007
Publication statusPublished - 1 Oct 2007


  • critical phenomena
  • self-organization
  • universality

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