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- W4284960397 abstract "While all quantum algorithms can be expressed in terms of single-qubit and two-qubit gates, more expressive gate sets can help reduce the algorithmic depth. This is important in the presence of gate errors, especially those due to decoherence. Using superconducting qubits, we have implemented a three-qubit gate by simultaneously applying two-qubit operations, thereby realizing a three-body interaction. This method straightforwardly extends to other quantum hardware architectures, requires only a firmware upgrade to implement, and is faster than its constituent two-qubit gates. The three-qubit gate represents an entire family of operations, creating flexibility in quantum-circuit compilation. We demonstrate a gate fidelity of $97.90%$, which is near the coherence limit of our device. We then generate two classes of entangled states, the GHZ and W states, by applying the new gate only once; in comparison, decompositions into the standard gate set would have a two-qubit gate depth of two and three, respectively. Finally, we combine characterization methods and analyze the experimental and statistical errors on the fidelity of the gates and of the target states." @default.
- W4284960397 created "2022-07-10" @default.
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- W4284960397 date "2022-07-06" @default.
- W4284960397 modified "2023-10-14" @default.
- W4284960397 title "Extensive characterization of a family of efficient three-qubit gates at the coherence limit" @default.
- W4284960397 doi "https://doi.org/10.48550/arxiv.2207.02938" @default.
- W4284960397 hasPublicationYear "2022" @default.
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