  We discuss the creation of quantum discord between two two-level atoms
trapped in an optical cavity in a noisy environment. It is shown that nonzero
steady-state quantum discord between atoms can be obtained when the white-noise
field is separately imposed on atoms or cavity mode, while the steady-state
quantum discord reaches zero if both cavity mode and atoms are driven
simultaneously by white-noise fields. In particular, we demonstrate that
white-noise field in different cases can play a variously constructive role in
the generation of quantum discord.
