Optimal Multiqubit Operations for Josephson Charge Qubits
Antti O. Niskanen, Juha J. Vartiainen, Martti M. Salomaa
DOI 10.1103/PhysRevLett.90.197901 · Physical Review Letters
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Abstract
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.
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