title: Circular solitons do not exist in photorefractive media.
abstract: The shape of two-dimensional solitary beams propagating in photorefractive media with an externally applied field is studied. The analytical results indicate that, for both focusing and defocusing nonlinearities, radially symmetric self-channeled beams do not exist. Some recent experiments are interpreted in light of the present results.
authors: M
authors: M
authors: Saffman
authors: A A
authors: AA
authors: Zozulya