We consider two mean-field like models which belong to the universality class of absorbing phase transitions with a conserved field. In both cases we analytically derive the order parameter as a function of the control parameter and of an external field conjugated to the order parameter. This allows us to calculate the universal scaling function of the mean-field behaviour. The obtained universal function is in perfect agreement with recently obtained numerical data of the corresponding five- and six-dimensional models, showing that four is the upper critical dimension of this particular universality class.
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PUBLICATION RECORD
- Publication year
2002
- Venue
Journal of Physics A
- Publication date
2002-04-30
- Fields of study
Mathematics, Physics
- Identifiers
- External record
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