Automated synthesis of dynamically corrected quantum gates

作者：Khodjasteh Kaveh^*; Bluhm Hendrik; Viola Lorenza

来源：Physical Review A, 2012, 86(4): 042329.

DOI：10.1103/PhysRevA.86.042329

Dynamically corrected gates are extended to non-Markovian open quantum systems where limitations on the available controls and/or the presence of control noise make existing analytical approaches unfeasible. A computational framework for the synthesis of dynamically corrected gates is formalized that allows sensitivity against non-Markovian decoherence and control errors to be perturbatively minimized via numerical search, resulting in robust gate implementations. Explicit sequences for achieving universal high-fidelity control in a singlet-triplet spin qubit subject to realistic system and control constraint are provided, which simultaneously cancel to the leading order the dephasing due to non-Markovian nuclear-bath dynamics and voltage noise affecting the control fields. Substantially improved gate fidelities are predicted for current laboratory devices.

• 出版日期2012-10-22