Eur. Phys. J. B 64, 415-421 (2008)
https://doi.org/10.1140/epjb/e2008-00022-4

Nonequilibrium phase transitions into absorbing states

Focused around the pair contact process with diffusion

¹ Institut für Theoretische Physik, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany
² School of Physics, Korea Institute for Advanced Study, 130-722 Seoul, Korea

Corresponding author: ^a hgpark@kias.re.kr

Received: 31 August 2007
Published online: 18 January 2008

Abstract

Systems with absorbing (trapped) states may exhibit a nonequilibrium phase transition from a noise-free inactive phase into an ever-lasting active phase. We briefly review the absorbing critical phenomena and universality classes, and discuss over the controversial issues on the pair contact process with diffusion (PCPD). Two different approaches are proposed to clarify its universality issue, which unveil strong evidences that the PCPD belongs to a new universality class other than the directed percolation class.