Measurement of g-factor tensor in a quantum dot and disentanglement of   exciton spins
  We perform polarization-resolved magneto-optical measurements on single InAsP quantum dots embedded in an InP nanowire. In order to determine all elements of the electron and hole $g$-factor tensors, we measure in magnetic field with different orientations. The results of these measurements are in good agreement with a model based on exchange terms and Zeeman interaction. In our experiment, polarization analysis delivers a powerful tool that not only significantly increases the precision of the measurements, but also enables us to probe the exciton spin state evolution in magnetic fields. We propose a disentangling scheme of heavy-hole exciton spins enabling a measurement of the electron spin $T_2$ time. 
B. J. Witek, R. W. Heeres, U. Perinetti, E. P. A. M. Bakkers, L. P.   Kouwenhoven, and V. Zwiller
cond-mat.mtrl-sci