Magnetic Field Tolerant Superconducting Spiral Resonators for Circuit QED

• URL: http://arxiv.org/abs/2406.10386v1
• Date: Fri, 14 Jun 2024 19:31:57 GMT
• Title: Magnetic Field Tolerant Superconducting Spiral Resonators for Circuit QED
• Authors: M. Medahinne, Y. P. Kandel, S. Thapa Magar, E. Champion, J. M. Nichol, M. S. Blok,
• Abstract summary: We present spiral resonators of thin film niobium (Nb) that exhibit large geometric inductance, high critical magnetic fields and high single photon quality factors. These low geometric loss inductors can be a compelling alternative to kinetic inductors to create high-impedance superconducting devices.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We present spiral resonators of thin film niobium (Nb) that exhibit large geometric inductance, high critical magnetic fields and high single photon quality factors. These low loss geometric inductors can be a compelling alternative to kinetic inductors to create high-impedance superconducting devices for applications that require magnetic fields. By varying the spiral pitch, we realize resonators with characteristic impedances ranging from 3.25-7.09 k{\Omega}. We measure the temperature and magnetic field dependent losses and find that the high-impedance resonators maintain an intrinsic quality factor above {\sim} 10^5 for parallel magnetic fields of up to 1 T. These properties make spiral Nb resonators a promising candidate for quantum devices that require circuit elements with high impedance and magnetic field resilience.

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