Equivalence of conditional and external field ensembles in absorbing state phase transitions

Abstract

I comment on the relation between two sampling methods for absorbing state models. It is shown that a certain ensemble without external field conditional to activity coincides with the unconditional ensemble for sufficiently small external field. The actual physical processes involved are identical and the derivation of the identity of the scaling behaviour relies on a single (established) scaling law. While the conditional ensemble by construction does not contain information about the system with large external field, it contains all information about the limit of vanishing external field and about the vicinity of the critical point: Finite size scaling as well as critical scaling in the temperature-like variable or in (small) external field.

arXiv comment6 pages (single column), 2 figures, RevTeX

References in corpus (6)

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• Universal scaling behavior of non-equilibrium phase transitions
• Order Parameter and Scaling Fields in Self-Organized Criticality
• Universal finite-size scaling behavior and universal dynamical scaling behavior of absorbing phase transitions with a conserved field
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• Simple quasistationary method for simulations of epidemic processes with localized states
• Block scaling in the directed percolation universality class