sender site not demanding such fine control will simplify the fabrication significantly.

One can also think of sending a “known" quantum state from the sender to receiver. This occurs in a few occasions such as the remote quantum state preparation [@Bennet-remote] in which preparing the quantum state at some place is impossible due to practical issues, like inaccessibility of certain sites. Thus, the quantum state has to be prepared at one location and then transferred to the less accessible ones. There might be also several users for whom the quantum states are prepared in a single location (which needs simpler fabrication) and then distributed between them (see Refs. [@bayat-router; @Kay-perfect] for more details on information routers). In all these cases *known* quantum states have to be transferred from one place to another. It may be argued that by knowing the quantum state, the sender can simply send the Bloch vector $(n_x,n_y,n_z)$ of the qubit to the receiver via classical communication to prepare the state at the receiver site and there is no need for quantum communication. This possibility is indeed correct, however, the parameters of the Bloch vector are real numbers and sending them may need very long string of 