  The Buneman instability occurring when an electron population is drifting
with respect to the ions is analyzed in the quantum linear and nonlinear
regimes. The one-dimensional low-frequency and collisional model of Shokri and
Niknam [Phys. Plasmas, v. 12, p. 062110 (2005)] is revisited introducing the
Bohm potential term in the momentum equation. The linear regime is investigated
analytically, and quantum effects result in a reduction of the instability. The
nonlinear regime is then assessed both numerically and analytically, and pure
quantum density oscillations are found to appear during the late evolution of
the instability.
