Equilibrium fluctuations for the slow boundary exclusion process
  We prove that the equilibrium fluctuations of the symmetric simple exclusion process in contact with slow boundaries is given by an Ornstein-Uhlenbeck process with Dirichlet, Robin or Neumann boundary conditions depending on the range of the parameter that rules the slowness of the boundaries. 
Tertuliano Franco, Adriana Neumann and Patr\'icia Gon\c{c}alves
math.PR