Today, most superconducting microwave resonators are made of ordinary, straight wires. A conventional single-wire resonator has an impedance bounded by the impedance of free space (377 Ω). In contrast, the resonators that we are developing reach impedances in the order of 104 Ω by harnessing the mutual-inductance between concentric loops in a spiral pattern. Eventually, such low-loss superinductors can be used for new qubit designs that are robust against noise and for hybrid quantum architectures coupling superonducting circuits to spin qubits.
Funded projects
“Spiraling into control: ultra high-impedance superconducting resonators for strongly-coupled spin-cavity QED”
National Science Foundation – with Prof. Nichol @ UofR
Relevant Publications
Magnetic Field Tolerant Superconducting Spiral Resonators for circuit quantum electrodynamics
M. Medahinne, Y.P. Kandel, S. Thapa Magar, E. Champion, J.M. Nichol and M.S. Blok
Phys. Rev. Appl. 23, 01470 (2025) | Arxiv:2406.10386