Control the qubit-qubit coupling with double superconducting resonators

• URL: http://arxiv.org/abs/2602.11576v1
• Date: Thu, 12 Feb 2026 04:49:26 GMT
• Title: Control the qubit-qubit coupling with double superconducting resonators
• Authors: Hui Wang, Rui Wang, Daichi Sugiyama, J. S. Tsai,
• Abstract summary: We experimentally studied the switching off processes in the double-resonator coupler superconducting quantum circuit.<n>In both frequency and time-domain, we observed the variation of qubit-qubit effective coupling by tuning qubits'frequencies.
• Score: 4.014502852235916
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We experimentally studied the switching off processes in the double-resonator coupler superconducting quantum circuit.In both frequency and time-domain, we observed the variation of qubit-qubit effective coupling by tuning qubits'frequencies. According to the measurement results, by just shifting qubits' frequencies smaller than 50 MHz, the effective qubit-qubit coupling strength can be tuned from switching off point to two qubit gate point (effective coupling larger than 5 MHz) in double-resonator superconducting quantum circuit. The double-resonator coupler superconducting quantum circuit has the advantage of simple fabrications, introducing less flux noises, reducing occupancy of dilution refrigerator cables, which might supply a promising platform for future large-scale superconducting quantum processors.

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