Robust optimal quantum gates for Josephson charge qubits
量子物理
2009-11-13 v2 超导电性
摘要
Quantum optimal control theory allows to design accurate quantum gates. We employ it to design high-fidelity two-bit gates for Josephson charge qubits in the presence of both leakage and noise. Our protocol considerably increases the fidelity of the gate and, more important, it is quite robust in the disruptive presence of 1/f noise. The improvement in the gate performances discussed in this work (errors of the order of 10^{-3}-10^{-4} in realistic cases) allows to cross the fault tolerance threshold.
引用
@article{arxiv.quant-ph/0611166,
title = {Robust optimal quantum gates for Josephson charge qubits},
author = {Simone Montangero and Tommaso Calarco and Rosario Fazio},
journal= {arXiv preprint arXiv:quant-ph/0611166},
year = {2009}
}
备注
4 pages, 4 figures