Suppression of Unwanted ZZ Interactions in a Hybrid Two-Qubit System

Jaseung Ku, Xuexin Xu, Markus Brink, David C. McKay, Jared B. Hertzberg, Mohammad H. Ansari, B. L.T. Plourde

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Mitigating crosstalk errors, whether classical or quantum mechanical, is critically important for achieving high-fidelity entangling gates in multiqubit circuits. For weakly anharmonic superconducting qubits, unwanted ZZ interactions can be suppressed by combining qubits with opposite anharmonicity. We present experimental measurements and theoretical modeling of two-qubit gate error for gates based on the cross resonance interaction between a capacitively shunted flux qubit and a transmon, and demonstrate the elimination of the ZZ interaction.

Original languageEnglish (US)
Pages (from-to)200504
Number of pages1
JournalPhysical Review Letters
Volume125
Issue number20
DOIs
StatePublished - Nov 13 2020

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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