Single electron spin resonance spectroscopy using microwave photon counting

IQOQI Quantum Seminar

Electron Spin Resonance (ESR) spectroscopy characterizes paramagnetic impurities in a sample for chemistry, biology, and material sciences. We have developed a novel ESR detection method that reaches single spin sensitivity, using a microwave photon counter based on a superconducting qubit at millikelvin temperatures. I will present results obtained with Er3+ ions in a scheelite crystal and discuss applications in quantum sensing and computing.

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