  We present a communication protocol for chains of permanently coupled qubits
which achieves perfect quantum state transfer and which is efficient with
respect to the number chains employed in the scheme. The system consists of $M$
uncoupled identical quantum chains. Local control (gates, measurements) is only
allowed at the sending/receiving end of the chains. Under a quite general
hypothesis on the interaction Hamiltonian of the qubits a theorem is proved
which shows that the receiver is able to asymptotically recover the messages by
repetitive monitoring of his qubits.
