We show that intrinsic noise can induce spatio-temporal phenomena such as
Turing patterns and travelling waves in a Brusselator model with nonlocal
interaction terms. In order to predict and to characterize these quasi-waves we
analyze the nonlocal model using a system-size expansion. The resulting theory
is used to calculate the power spectra of the quasi-waves analytically, and the
outcome is tested successfully against simulations. We discuss the possibility
that nonlocal models in other areas, such as epidemic spread or social
dynamics, may contain similar stochastically-induced patterns.Comment: 13 pages, 6 figure
