Transient Dynamics in Magnetic Force Microscopy for a Single-Spin   Measurement
  We analyze a single-spin measurement using a transient process in magnetic force microscopy (MFM) which could increase the maximum operating temperature by a factor of Q (the quality factor of the cantilever) in comparison with the static Stern-Gerlach effect. We obtain an exact solution of the master equation, which confirms this result. We also discuss the conditions required to create a macroscopic Schrodinger cat state in the cantilever. 
G.P. Berman, F. Borgonovi, G. V.Lopez, V.I. Tsifrinovich