Experimentally realizable controlled NOT gate in a flux qubit/resonator system
作者： Shiro Saito , Todd Tilma , Simon J. Devitt , Kae Nemoto , Kouich Semba
DOI: 10.1103/PHYSREVB.80.224509
关键词: Qubit 、 Physics 、 Controlled NOT gate 、 Quantum mechanics 、 Pi Josephson junction 、 Flux qubit 、 Phase qubit 、 Josephson effect 、 Charge qubit 、 Resonator
摘要: In this paper we present an experimentally realizable microwave pulse sequence that effects a Controlled NOT (C-NOT) gate operation on Josephson junction-based flux-qubit/resonator system with high fidelity in the end state. We obtained C-NOT process of 0.988 (0.980) for two (three) qubit/resonator under ideal conditions, and 0.903 best, currently achieved, experimental conditions. both cases, found "qubit leakage" to higher levels resonator causes majority loss fidelity, such leakage becomes more pronounced as decoherence increase.
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