Spin-Echo Silencing Using a Current-Biased Frequency-Tunable Resonator

The ability to control microwave emission from a spin ensemble is a requirement of several quantum memory protocols. Here, we demonstrate such ability by using a resonator whose frequency can be rapidly tuned with a bias current. We store excitations in an ensemble of rare-earth ions and suppress on demand the echo emission (echo silencing) by two methods: (1) detuning the resonator during the spin rephasing, and (2) subjecting spins to magnetic field gradients generated by the bias current itself. We also show that spin coherence is preserved during silencing.

Automated summary

In this study, the researchers demonstrate the ability to control microwave emission from a spin ensemble using a tunable resonator. They suppress echo emission on demand by detuning the resonator during spin rephasing and subjecting spins to magnetic field gradients generated by a bias current. The authors also show that spin coherence is preserved during the silencing process.