Enhanced Convergence and Robust Performance of Randomized Dynamical Decoupling

Details Enhanced Convergence and Robust Performance of Randomized Dynamical Decoupling Enhanced Convergence and Robust Performance of Randomized Dynamical Decoupling

2006-02-21

arxiv.org/abs/quant-ph/0602168v3

Physical Review Letters 97, 150501 (2006)

Physics

Quantum Physics

4 pages, 3 figures, replaced with final version

Scientific paper

10.1103/PhysRevLett.97.150501

We demonstrate the advantages of randomization in coherent quantum dynamical control. For systems which are either time-varying or require decoupling cycles involving a large number of operations, we find that simple randomized protocols offer superior convergence and stability as compared to deterministic counterparts. In addition, we show how randomization always allows to outperform purely deterministic schemes at long times, including combinatorial and concatenated methods. General criteria for optimally interpolating between deterministic and stochastic design are proposed and illustrated in explicit decoupling scenarios relevant to quantum information storage.

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