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FRI: Friday Contributed Sessions
FRI 5: QIP Implementations: Solid-State Devices II
FRI 5.6: Talk
Friday, September 12, 2025, 12:00–12:15, ZHG006
Superconducting parallel-plate resonators for the detection of single electron spins — •André Pscherer, Jannes Liersch, Patrick Abgrall, Hélène Le Sueur, Emmanuel Flurin, and Patrice Bertet — Quantronics Group, Université Paris-Saclay, CNRS, SPEC, 91191 Gif-sur-Yvette Cedex, France
Solid-state spins have been explored as a resource for quantum sensing, computation and communication using mostly optical transitions to control and read out single spins [1]. Even though detecting spins via their spin-flip transition in the microwave frequency range would extend the palette of usable spins to those without optical transitions, this path seems impractical for single spins due to their vanishingly low radiative decay rates. Only recently, our group demonstrated the microwave-only detection of a single spin [2], enabled by a superconducting resonator with a Purcell factor of 1014 and a single-microwave-photon detector [3]. In this talk, I will explain the design of the currently used resonator and our progress towards a significantly improved resonator, which will shorten the spin lifetime to ∼ 10 µs.
[1] D. Awschalom et al., Nature Photonics, 12(9), 516-527 (2018)
[2] Z. Wang, L. Balembois et al., Nature, 619, 276-281 (2023)
[3] R. Lescanne et al., PRX 10, 021038 (2020)
Keywords: Purcell effect; spin; superconducting microwave circuits; quantum sensing; plasmonics