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arxiv: 1403.0035 · v1 · pith:AXG6OKHA · submitted 2014-03-01 · quant-ph · cond-mat.mes-hall· cond-mat.supr-con

Optimal quantum control using randomized benchmarking

J. Kelly , R. Barends , B. Campbell , Y. Chen , Z. Chen , B. Chiaro , A. Dunsworth , A. G. Fowler
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I.-C. Hoi E. Jeffrey A. Megrant J. Mutus C. Neill P. J. J. O`Malley C. Quintana P. Roushan D. Sank A. Vainsencher J. Wenner T. C. White A. N. Cleland John M. Martinis
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classification quant-ph cond-mat.mes-hallcond-mat.supr-con
keywords controlbenchmarkingerrorsexperimentalgategatesmethodquantum
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We present a method for optimizing quantum control in experimental systems, using a subset of randomized benchmarking measurements to rapidly infer error. This is demonstrated to improve single- and two-qubit gates, minimize gate bleedthrough, where a gate mechanism can cause errors on subsequent gates, and identify control crosstalk in superconducting qubits. This method is able to correct parameters to where control errors no longer dominate, and is suitable for automated and closed-loop optimization of experimental systems.

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