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Random decoupling schemes for quantum dynamical control and error suppression



Lorenza Viola, Emanuel Knill


We introduce a general control-theoretic setting for random dynamical decoupling, applicable to quantum , engineering of both closed-and open-system dynamics. The basic idea is to randomize the operations of the controller, by designing the control propagator according to a random rather than deterministic path on a group. We characterize the performance of random decoupling schemes, and identify control scenarios where they can significantly weaken time scale requirements as compared to standard cyclic protocols. Implications for reliable quantum computation are discussed.
Physical Review Letters


decoupling, quantum computation, quantum error control


Viola, L. and Knill, E. (2005), Random decoupling schemes for quantum dynamical control and error suppression, Physical Review Letters (Accessed April 16, 2024)
Created February 17, 2005, Updated October 12, 2021