Continuous-variable quantum-information distributor: Reversible telecloning
Jing Zhang, Changde Xie, Kunchi Peng · Physical Review A · 2006
We first classify the quantum clone into irreversible and reversible types from the perspective of quantum-information distribution. We propose a scheme of continuous-variable reversible telecloning, which broadcast the information of an unknown state without loss from a sender to several spatially separated receivers exploiting multipartite entanglement as quantum channels. In this scheme, the quantum information of an unknown state is distributed into $M$ optimal clones and $M\ensuremath{-}1$ anticlones using $2M$-partite entanglement. For the perfect quantum-information distribution that is optimal cloning, $2M$-partite entanglement is required to be a maximum two-party entanglement.