Sharing quantum nonlocality and teleportation over long distances using optical hybrid states
Subhankar Bera, Soumyakanti Bose, Hyunseok Jeong, A. S. Majumdar · Journal of the Optical Society of America B · 2025
We analyze the sharing Bell-type nonlocal correlation between two distant parties with optical hybrid states comprising a single photon polarization state and a multiphoton coherent state. By deploying entanglement swapping over the coherent state parts at the middle station, we show that the optical hybrid states can efficiently generate a polarization-entangled state that violates the Clauser–Horne–Shimony–Holt Bell-inequality well over a metropolitan distance. We further assess the quality of the shared entangled state in the information processing task of quantum teleportation of an unknown polarization qubit. Our results with realistic devices, embedding detection inefficiency and transmission losses, indicate the viability of faithful quantum teleportation over large distances, consistent with the quality of the shared correlation.