Dynamical decoupling

“Performance of Deterministic Dynamical Decoupling Schemes: Concatenated and Periodic Pulse Sequences”, Phys. Rev. A 75, 062310 (2007), by K. Khodjasteh and D.A. Lidar. [link] ;  “Erratum:  Performance of Deterministic Dynamical Decoupling Schemes: Concatenated and Periodic Pulse Sequences”, Phys Rev A 79, 069901(E) (2009).