  We demonstrate the turbulent dynamics of the Nambu-Goto open string in the
AdS3 spacetime. While the motion of a classical closed string in AdS is known
to be integrable, the integrability of an open string motion depends on the
boundary conditions at the string endpoints. We numerically solve the equations
of motion of the open string under the boundary conditions where the endpoints
are i) fixed to a finite radial coordinate in AdS, and ii) free. For i), we
find turbulence on the string, that shows a cascade in the energy and angular
momentum spectra. This result indicates the non-integrability of the open
string with this type of boundary conditions. For ii), we find no turbulence.
This is consistent with the integrability of the open string with the free
boundary conditions.
