Changes in the Magnetization of a Double Quantum Dot
  From accurate measurements of the energy states in a double quantum dot we deduce the change in magnetization due to single electron tunneling. As a function of magnetic field we observe crossings and anti-crossings in the energy spectrum. The change in magnetization exhibits wiggles as a function of magnetic field with maximum values of a few effective Bohr magnetons in GaAs. These wiggles are a measure of the chaotic motion of the discrete energy states versus magnetic field. Our results show good agreement with a numeric calculation but deviate significantly from semiclassical estimates. 
T.H. Oosterkamp, S.F. Godijn, M.J. Uilenreef, Y.V. Nazarov, N.C. van   der Vaart and L.P. Kouwenhoven