Electron Spin Resonance with up to 20 Spin Sensitivity Measured using a Superconducting Flux Qubit

Rangga P. Budoyo, Kosuke Kakuyanagi, Hiraku Toida +2

We report on electron spin resonance spectroscopy measurements using a superconducting flux qubit with a sensing volume of 6 fl. The qubit is read out using a frequency-tunable Jos…