Figure 1: Example of how spin packets in a condensed matter system can be accessed and studied, adapted from Kubo et al. [4]. A diamond slab containing nitrogen-vacancy center spins (arrows) is positioned above a microfabricated superconducting resonator. A magnetic field ${\text{B}}_{\text{NV}}$ is applied as shown to tune the $\text{NV}$ centers. A microwave signal excites a mode in the resonator with magnetic field ${\text{B}}_r$ to manipulate and probe the spin ensemble.