Complementing the transmon by integrating a geometric shunt inductor

• URL: http://arxiv.org/abs/2410.10416v1
• Date: Mon, 14 Oct 2024 12:06:57 GMT
• Title: Complementing the transmon by integrating a geometric shunt inductor
• Authors: Simone D. Fasciati, Boris Shteynas, Giulio Campanaro, Mustafa Bakr, Shuxiang Cao, Vivek Chidambaram, James Wills, Peter J. Leek,
• Abstract summary: We show that the ZZ interaction between the two qubits is completely suppressed when they are flux-biased to have opposite-sign anharmonicities. The simplicity of this two-qubit-species circuit makes it promising for building large lattices of superconducting qubits with low coherent error and a rich gate set.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We realize a single-Josephson-junction transmon qubit shunted by a simple geometric inductor. We couple it capacitively to a conventional transmon and show that the ZZ interaction between the two qubits is completely suppressed when they are flux-biased to have opposite-sign anharmonicities. Away from the flux sweet spot of the inductively-shunted transmon, we demonstrate fast two-qubit interactions using first-order sideband transitions. The simplicity of this two-qubit-species circuit makes it promising for building large lattices of superconducting qubits with low coherent error and a rich gate set.

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