1305.7026 (Claudia Benedetti et al.)

Time-evolution of entanglement and quantum discord of bipartite systems
subject to 1/f^α noise    [PDF]

Claudia Benedetti, Matteo G. A. Paris, Fabrizio Buscemi, Paolo Bordone

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.

View original: http://arxiv.org/abs/1305.7026