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Open Access Publications from the University of California

Inductive-detection electron-spin resonance spectroscopy with 65 spins/√Hz sensitivity

  • Author(s): Probst, S
  • Bienfait, A
  • Campagne-Ibarcq, P
  • Pla, JJ
  • Albanese, B
  • Da Silva Barbosa, JF
  • Schenkel, T
  • Vion, D
  • Esteve, D
  • Mølmer, K
  • Morton, JJL
  • Heeres, R
  • Bertet, P
  • et al.

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© 2017 Author(s). We report electron spin resonance spectroscopy measurements performed at millikelvin temperatures in a custom-built spectrometer comprising a superconducting micro-resonator at 7 GHz and a Josephson parametric amplifier. Owing to the small (∼10-12λ3) magnetic resonator mode volume and to the low noise of the parametric amplifier, the spectrometer's single shot sensitivity reaches 260 ± 40 spins/echo translating into 65±10 spins/√Hz for repeated acquisition.

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