qmech FY2021 Annual Report 04

Figure: (a) we cool the motion of a trapped magnet (green disc), which is trapped in a harmonic potential (black parabola), by coupling the internal spin waves to a standing microwave field in a microwave cavity which is driven (red arrow); (b) analogy with an optomechanical system; (c) the incredible cooling ability of our scheme: we plot the equilibrium phonon occupation of our scheme (blue line), as compared with traditional cooling schemes (red line), as the radius of the spherical magnet increases. We keep cool!