Figure 3: Time-bin qubit and Bloch sphere representation.
(a) Arrival time of the exciton photons recorded with respected to the pump pulse. The grey-shaded regions are the 1.28 ns windows taken for extracting the triple coincidences (laser–biexciton–exciton). The side peaks are the projections onto the time-basis states |0› and |1›. The middle peak is the projection onto the energy bases |±X› and |±Y› for the phase settings φX=0 and π/2, respectively. Here, subscript A stands for the analysing and P for the pump interferometer. (b) The time-bin qubit states are represented on a Bloch sphere.
