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We demonstrate that a seven-particle entangled state can be used to realize the deterministic asymmetric bidirectional controlled quantum information transmission by performing only Bell-state measurement and two-particle projective measurement and single-particle measurement. In our protocol, Alice can teleport an arbitrary unknown single-particle state to Bob and at the same time Bob can remotely prepare an arbitrary known two-particle state for Alice via the control of the supervisor Charlie. [ABSTRACT FROM AUTHOR]

We propose a seven-ion entangled channel that can be used to realize the deterministic controlled teleportation of an arbitrary three-ion state in ion-trap systems. We describe the construction of this channel and explicitly demonstrate how the protocol works. In our scheme, it does not involve Bell-state measurement and only needs to perform the single-ion measurements and single ion unitary operations. [ABSTRACT FROM AUTHOR]

We provide various schemes for quantum teleportation by using the four and five qubit cluster states. Explicit protocols for the perfect quantum teleportation of three and four qubit states are illustrated. It is found that the four-qubit cluster state can be used for perfect quantum teleportation of a special form of three-qubit state and the five-qubit cluster state can be used for perfect quantum teleportation of a special form of four-qubit state. [ABSTRACT FROM AUTHOR]

We propose an experimentally feasible scheme for implementing controlled quantum secure direct communication by using six-qubit entangled states. According to the results measured by the sender and the controller, the receiver can obtain different secret messages in a deterministic way with unit successful probability. In our scheme, the information-carrying qubits do not need to be transmitted over the public channel. Therefore, the scheme is determinate and secure. [ABSTRACT FROM AUTHOR]