Modulational instability, solitons and beam propagation in spatially   nonlocal nonlinear media
  We present an overview of recent advances in the understanding of optical beams in nonlinear media with a spatially nonlocal nonlinear response. We discuss the impact of nonlocality on the modulational instability of plane waves, the collapse of finite-size beams, and the formation and interaction of spatial solitons. 
W. Krolikowski, O. Bang, N.I. Nikolov, D. Neshev, J. Wyller,   J.J.Rasmussen, and D. Edmundson