Experimentally Realizable C-NOT Gate in a Flux Qubit/Resonator System

Details Experimentally Realizable C-NOT Gate in a Flux Qubit/Resonator System Experimentally Realizable C-NOT Gate in a Flux Qubit/Resonator System

2009-04-06

arxiv.org/abs/0904.0933v1

Phys. Rev. B 80, 224509 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 4 figures, submitted to Phys. Rev. B

Scientific paper

In this paper 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 fidelity in the end state. 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. In both cases, we found that "qubit leakage" to higher levels of the resonator causes a majority of the loss of fidelity, and that such leakage becomes more pronounced as decoherence effects increase.

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