  We study the dynamics of quantum correlations for two non interacting qubits
initially prepared in a maximally entangled state and then coupled with an
external environment characterized by a noise spectrum of the form
1/f^{\alpha}. The noise spectrum is due to the interaction of each qubit with a
collection of N_f classical fluctuators with fixed switching rates. We find
that, depending on the characteristic of the noise spectrum considered, both
entanglement and quantum discord display either a monotonic decay or the
phenomena of sudden death and revivals.
