Density profiles of the exclusive queueing process
  The exclusive queueing process (EQP) incorporates the exclusion principle into classic queueing models. It can be interpreted as an exclusion process of variable system length. Here we extend previous studies of its phase diagram by identifying subphases which can be distinguished by the number of plateaus in the density profiles. Furthermore the influence of different update procedures (parallel, backward-ordered, continuous time) is determined. 
Chikashi Arita and Andreas Schadschneider
cond-mat.stat-mech nlin.CG