  Spin-mechanics studies interactions between spin systems and mechanical
vibrations in a nanomechanical resonator and explores their potential
applications in quantum information processing. In this tutorial, we summarize
various types of spin-mechanical resonators and discuss both the
cavity-QED-like and the trapped-ion-like spin-mechanical coupling processes.
The implementation of these processes using negatively charged nitrogen vacancy
and silicon vacancy centers in diamond is reviewed. Prospects for reaching the
full quantum regime of spin-mechanics, in which quantum control can occur at
the level of both single spin and single phonon, are discussed with an emphasis
on the crucial role of strain coupling to the orbital degrees of freedom of the
defect centers.
