Publication
Physical Review Applied
Paper

Suppressed Crosstalk between Two-Junction Superconducting Qubits with Mode-Selective Exchange Coupling

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Abstract

Fixed-frequency qubits can suffer from always-on interactions that inhibit independent control. Here, we address this issue by experimentally demonstrating a superconducting architecture using qubits that comprise of two capacitively shunted Josephson junctions connected in series. Historically known as tunable coupling qubits (TCQs), such two-junction qubits support two modes with distinct frequencies and spatial symmetries. By selectively coupling only one type of mode and using the other as our computational basis, we greatly suppress crosstalk between the data modes while permitting all-microwave two-qubit gates.

Date

22 Nov 2021

Publication

Physical Review Applied

Authors

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