Lets assume that in the delayed eraser in Kim experiment https://en.wikipedia.org/wiki/Delayed-choice_quantum_eraser#The_experiment_of_Kim_et_al._(1999) we can split the original photon into 2 photons, namely signal and idler photon, but we only have D0 detector and no other detectors, no beam splitters , no mirrors. We will let the idler photons travel freely in the universe without being detected or analysed by any device. As we have no "which path" information about the signal photons shall we receive interference pattern on D0?
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