Optimal multiqubit operations for Josephson charge qubits.
We introduce a method for finding the required control parameters for a quantum computer that yields the desired quantum algorithm without invoking elementary gates. We concentrate on the Josephson charge-qubit model, but the scenario is readily extended to other physical realizations. Our strategy is to numerically find any desired double- or triple-qubit gate. The motivation is the need to significantly accelerate quantum algorithms in order to fight decoherence.
Niskanen
Antti O
AO
Materials Physics Laboratory, Helsinki University of Technology, POB 2200 (Technical Physics), FIN-02015 HUT, Espoo, Finland. antti.niskanen@vtt.fi
Vartiainen
Juha J
JJ
Salomaa
Martti M
MM