Four qubit time-bin entangled GHZ-state generation
Leili Esmaeilifar, Ashutosh Kumar Singh, Pascal Lefebvre, Daniel Oblak, Nasser Gohari Kamel · 2024
A pair of time-bin entangled states are generated using the spontaneous parametric down-conversion process in two PPLN crystals. One photon from either source interferes on an optical switch. A four-qubit GHZ-state is generated by post-selecting the photons at all the four output ports.