title: Simplest nonequilibrium phase transition into an absorbing state.
abstract: We study in further detail particle models displaying a boundary-induced absorbing state phase transition [Deloubrière and van Wijland Phys. Rev. E 65, 046104 (2002) and Barato and Hinrichsen, Phys. Rev. Lett. 100, 165701 (2008)]. These are one-dimensional systems consisting of a single site (the boundary) where creation and annihilation of particles occur, and a bulk where particles move diffusively. We study different versions of these models and confirm that, except for one exactly solvable bosonic variant exhibiting a discontinuous transition and trivial exponents, all the others display nontrivial behavior, with critical exponents differing from their mean-field values, representing a universality class. Finally, the relation of these systems with a (0+1)-dimensional non-Markovian process is discussed.
authors.affiliation: Universität Würzburg, Fakultät für Physik und Astronomie, 97074 Würzburg, Germany.
authors.forename: A C
authors.initials: AC
authors.lastname: Barato
authors.forename: Juan A
authors.initials: JA
authors.lastname: Bonachela
authors.forename: C E
authors.initials: CE
authors.lastname: Fiore
authors.forename: H
authors.initials: H
authors.lastname: Hinrichsen
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Muñoz