Random decoupling schemes for quantum dynamical control and error suppression

Details Random decoupling schemes for quantum dynamical control and error suppression Random decoupling schemes for quantum dynamical control and error suppression

2005-11-12

arxiv.org/abs/quant-ph/0511120v1

Physical Review Letters, 94, 060502 (2005)

Physics

Quantum Physics

9 pages, no figures

Scientific paper

10.1103/PhysRevLett.94.060502

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.

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