  Quantum turbulence is numerically studied by solving the Gross-Pitaevskii
equation. Introducing both the energy dissipation at small scales and the
energy injection at large scales, we succeed in obtaining the steady turbulence
made by the balance of the injection and the dissipation of the energy. The
inertial range takes the Kolmogorov spectrum and the energy flux is consistent
with the energy dissipation rate at small scales. These results confirm the
properties of the inertial range of quantum turbulence, proposing a prototype
of turbulence much simpler than conventional classical turbulence.
