  The use of single electron spins in quantum dots as qubits requires detailed
knowledge about the processes involved in their initialization and operation as
well as their relaxation and decoherence. In optical schemes for such spin
qubits, spin-flip Raman as well as Auger processes play an important role, in
addition to environment-induced spin relaxation. In this paper, we demonstrate
how to quantitatively access all the spin-related processes in one go by
monitoring the charge fluctuations of the quantum dot. For this, we employ
resonance fluorescence and analyze the charge fluctuations in terms of
waiting-time distributions and full counting statistics characterized by
factorial cumulants.
