Publication
Physical Review Letters
Paper

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

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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.

Date

11 Nov 2020

Publication

Physical Review Letters

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