Random decoupling schemes for quantum dynamical control and error suppression

Abstract

We present a general control-theoretic framework for constructing and analyzing random decoupling schemes, applicable to quantum dynamical control of arbitrary finite-dimensional composite systems. The basic idea is to design the control propagator according to a random rather than deterministic path on a group. We characterize the performance of random decoupling protocols, and identify control scenarios where they can significantly weaken time scale requirements as compared to cyclic counterparts. Implications for reliable quantum computation are discussed.

9 pages, no figures

References in corpus (1)

• Dynamical suppression of telegraph and 1/f noise due to quantum bistable fluctuator

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