Demonstration of 1 → 3 continuous-variable quantum telecloning

The distribution of the quantum states to remote receivers is an indispensable technology in quantum communication, quantum networks, and quantum information processing. Perfect distribution does not allow any quantum information loss of the distributed quantum state. Quantum telecloning, which is made up of quantum cloning and quantum teleportation, is a remote quantum information distribution protocol. Here, we experimentally demonstrate unconditional 1 -> 3 quantum telecloning of coherent states, and the fidelities of the cloned states are 0.64 +/- 0.01, 0.64 +/- 0.01, and 0.49 +/- 0.01, respectively. No information about the unknown state is lost during the telecloning process by exploiting the quadripartite entangled modes as an auxiliary resource. Deterministic 1 -> 3 quantum telecloning has great potential for applications in advanced quantum technology.

Automated summary

The experiment demonstrates unconditional 1 -> 3 quantum telecloning of coherent states, with fidelities of the cloned states at 0.64 +/- 0.01, 0.64 +/- 0.01, and 0.49 +/- 0.01, respectively. The use of quadripartite entangled modes as an auxiliary resource ensures that no information about the unknown state is lost during the telecloning process. Deterministic 1 -> 3 quantum telecloning shows great potential for applications in advanced quantum technology.