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The no-quantum broadcasting theorem which is a weaker version of thenocloning theorem restricts us from broadcasting completely unknown quantuminformation to multiple users. However, if the sender is aware of the quantuminformation (state) to be broadcasted then the above restriction disappears andthe task reduces to a multiparty remote state preparation. Without recognizingthis fact, several schemes for broadcasting of known quantum states have beenproposed in the recent past (e.g., Quantum Inf Process (2017) 16:41) anderroneously/misleadingly referred to as protocols for quantum broadcasting.Here we elaborate on the relation between the protocols of remote statepreparation and those of broadcasting of known quantum information and showthat it's possible to broadcast known quantum information to multiple receiversin deterministic as well as probabilistic manner with optimal resources.Further, the effect of noise on such schemes, and some new facets (like jointbroadcasting) of such schemes have been discussed. A proof of principlerealization of the proposed optimal scheme using IBM quantum computer is alsoreported. Possibilities of generalizations of the so-called broadcastingschemes and potential applications are also discussed with appropriateimportance.

Many facets of multiparty broadcasting of known quantum information using optimal quantum resource