Single pairs of time-bin-entangled photons
Marijn A. M. Versteegh, Michael E. Reimer, Aafke A. van den Berg, G. Juška, V. Dimastrodonato, Agnieszka M. Gocalinska, E. Pelucchi, Val Zwiller · Physical Review A · 2015
Time-bin-entangled photons are ideal for long-distance quantum communication via optical fibers. Here we present a source where, even at high creation rates, each excitation pulse generates, at most, one time-bin-entangled pair. This is important for the accuracy and security of quantum communication. Our site-controlled quantum dot generates single polarization-entangled photon pairs, which are then converted, without loss of entanglement strength, into single time-bin-entangled photon pairs.