Blockage induced condensation controlled by a local reaction
  We consider the set-up of stationary Zero Range models and discuss the onset of condensation induced by a local blockage on the lattice. We show that the introduction of a local feedback on the hopping rates allows to control the particle fraction in the condensed phase. This phenomenon results in a current vs. blockage parameter curve characterized by two non--analyticity points. 
Emilio N.M. Cirillo, Matteo Colangeli, Adrian Muntean
cond-mat.stat-mech