  We study the origin of turbulence on the string worldsheet with boundaries
laid in anti de Sitter (AdS) spacetime. While the classical motion of a single
closed string in AdS is integrable, it has recently been recognized that weak
turbulence arises in the case of an open string suspended from the AdS
boundary. In the open string case, it is necessary to impose boundary
conditions on the worldsheet boundaries. We classify which boundary conditions
preserve integrability. Based on this classification, we anticipate that
turbulence may occur on the string worldsheet if integrability is not
guaranteed by the boundary conditions. Numerical investigations of the
classical open-string dynamics support that turbulence occurs when the boundary
conditions are not integrable.
