Abstract
We present an experimentally realizable microwave pulse sequence that effects a controlled-NOT (C-NOT) gate operation on a Josephson-junction-based flux qubit/resonator system with high-process fidelity. We obtained a C-NOT gate process fidelity of 0.988 (0.980) for a two-(three-)qubit/resonator system under ideal conditions and a fidelity of 0.903 for a two-qubit/resonator system under the best, currently achieved, experimental conditions. Our simulations show that this gate is a feasible first step toward multiqubit quantum-information processing with flux qubit/resonator systems.
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