March 13, 2018
1:30 PM - 2:30 PM
Speaker: Patrice Bertet
Title: "Circuit - QED - enhanced magnetic resonance"
The detection and characterization of paramagnetic species by electron-spin resonance (ESR) spectroscopy has numerous applications in chemistry, biology, and materials science. Most ESR spectrometers rely on the inductive detection of the small microwave signals emitted by the spins during their Larmor precession into a microwave resonator in which they are embedded. Using the tools offered by circuit Quantum Electrodynamics (QED), namely high quality factor superconducting micro-resonators and Josephson parametric amplifiers that operate at the quantum limit when cooled at 20mK, we investigate magnetic resonance in a new regime where teh quantum nature of the microwave field plays a role. In particular, the spin detection sensitivity is strongly enhanced and spin relaxtion is governed by spontaneous emission through the cavity. In this talk we will consider applications of this new regime to ultra-high-sensitivity nuclear spin detection and electron spin hyperpolarization.