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Superconducting Qubits

Fast microwave-driven three-qubit gates for cavity-coupled superconducting qubits

arXiv

Authors: Edwin Barnes, Christian Arenz, Alexander Pitchford, Sophia E. Economou

Year

2016

Paper ID

41522

Status

Preprint

Abstract Read

~2 min

Abstract Words

102

Citations

N/A

Abstract

Although single and two-qubit gates are sufficient for universal quantum computation, single-shot three-qubit gates greatly simplify quantum error correction schemes and algorithms. We design fast, high-fidelity three-qubit entangling gates based on microwave pulses for transmon qubits coupled through a superconducting resonator. We show that when interqubit frequency differences are comparable to single-qubit anharmonicities, errors occur primarily through a single unwanted transition. This feature enables the design of fast three-qubit gates based on simple analytical pulse shapes that are engineered to minimize such errors. We show that a three-qubit ccz gate can be performed in 260 ns with fidelities exceeding 99.38\%, or 99.99\% with numerical optimization.

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Although single and two-qubit gates are sufficient for universal quantum computation, single-shot three-qubit gates greatly simplify quantum error correction schemes and...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1612.09384 [2] arXiv https://arxiv.org/abs/1612.09384 [3] Publisher https://arxiv.org/abs/1612.09384

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