We report an experimental implementation of tripartite controlled quantum teleportation on the quantum optical devices. The protocol is performed through bi- and tripartite entangled channels of discrete variables and qubits encoded in polarization of individual photons. The experimental results demonstrate successful controlled quantum teleportation with a fidelity around 83%, well above the classical limit. By realizing the controlled quantum teleportation through biseparable state, we show that tripartite entangled is not a necessary resource for controlled quantum teleportation and the controller's capability to allow or prohibit the teleportation cannot be considered to be a manifestation of tripartite entanglement. These results open new possibilities for further application of controlled quantum teleportation by lowering teleportation channel's requirements.
@article{arxiv.1903.10881,
title = {Demonstration of quantum controlled teleportation for discrete variables on linear optical devices},
author = {Artur Barasiński and Antonín Černoch and Karel Lemr},
journal= {arXiv preprint arXiv:1903.10881},
year = {2019}
}