In this article we obtain the equilibrium fluctuations of a symmetric exclusion process in $\mathbb{ Z}$ with long jumps. The transition probability of the jump from $x$ to $y$ is proportional to $|x-y|^{ -\gamma-1}$. Here we restrict to the choice $\gamma \geq 2$ so that the system has a diffusive behavior. Moreover, when particles move between $\mathbb{ Z}_{ -}^{ *}$ and $\mathbb N$, the jump rates are slowed down by a factor $\alpha n^{ -\beta}$, where $\alpha>0$, $\beta\geq 0$ and $n$ is the scaling parameter. Depending on the values of $\beta$ and $\gamma$, we obtain several stochastic partial differential equations, corresponding to a heat equation without boundary conditions, or with Robin boundary conditions or Neumann boundary conditions.
Categories: math.PR