Coherent optical-microwave interface for manipulation of low-field electronic clock transitions in 171Yb3+:Y2SiO5

The coherent interaction of solid-state spins with both optical and microwave fields provides a platform for range quantum technologies, such as sensing, microwave-to-optical transduction memories. Rare-earth ions electronic are interesting in this context, but it is challenging to simultaneously efficiently drive transitions over long crystal. In work, we use loop-gap resonator coherently clock $^{171}$Yb$^{3+}$:Y$_2$SiO$_5$, at close zero external magnetic field. low field regime particularly interfacing these spin superconducting circuits. We achieve Rabi frequency 0.56 MHz 2.497 GHz, 1-cm Furthermore, provide new insights into the dephasing mechanism very fields, showing that superhyperfine-induced collapse Hahn echo signal plays an important role fields. Our calculations measurements reveal effective moment can be manipulated allowing suppress superhyperfine transition. At doping concentration 2 ppm temperature $3.4$ K, longest coherence time $10.0 \pm 0.4 ~\text{ms}$ reported $^{171}$Yb$^{3+}$:Y$_2$SiO$_5$.