1 Introduction</h5> Over the past decades, the transmission of quantum states over networks has received much attention for its fundamental importance into quantum communication and quantum information processing  . Based on the idea of quantum teleportation (QT) proposed by Bennett et al.  , various techniques of quantum state sharing [3–5] and remote state preparation (RSP) [6–13] have been developed for transferring quantum information over networks. Joint remote state preparation (JRSP) [14–26] is a variant in which remote preparation of a quantum state is performed under the supervision of controllers. The transparent differences among ST, RSP and JRSP rest in the degree of information about the state to be transmitted and the total cost of classical communication to be consumed for information transfer. In the standard teleportation, since nobody knows the transmitted quantum information, it is the most secure scheme requiring most amount of classical communication cost. In RSP, since the quantum state prepared is known to Alice but unknown to Bob, it sacrifices information security to the preparer but least amount of classical communication is required. As for JRSP, it guarantees the information security to either preparer, bringing additional classical communication cost than that in RSP.</P>So
Physics Letters A – Elsevier
Published: Nov 15, 2013
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