  In this work we studied the diffusive behavior of active brownian particles
under lateral parabolic confinement. The results showed that we go from
subdiffusion to ballistic motion as we vary the angular noise strength and
confinement intensity. We argued that the subdiffusion regimes appear as
consequence of the restricted space available for diffusion (achieved either
through large confinement and/or large noise); we saw that when there are large
confinement and noise intensity, a similar configuration to single file
diffusion appears; on the other hand, normal and superdiffusive regimes may
occur due to low noise (longer persistent motion), either through exploring a
wider region around the potential minimum in the transverse direction (low
confinement), or by forming independent clusters (high confinement).
