A scheme for probabilistic controlled teleportation of a triplet W state from the sender Alice to the distant receiver Bob is proposed. In this scheme, an m-qubit GHZ state serves as the control parameter. The m contr...A scheme for probabilistic controlled teleportation of a triplet W state from the sender Alice to the distant receiver Bob is proposed. In this scheme, an m-qubit GHZ state serves as the control parameter. The m control qubits are shared by m（s1, s2… sm） spatially-separated supervisors. With the aid of local operations and individual measurements, including Bell-state measurement, Von Neumann measurement, and mutual classical communication, etc., Bob can faithfully reconstruct the original state by performing relevant unitary transformations. However, even if one participant does not cooperate during the process, the receiver Bob cannot fully recover the original state. This protocol can be extended to probabilistic controlled teleportation of an arbitrary N-qubit state and some other N-qubit entangled states.展开更多
We present an implementation of the positive operator valued measure （POVM）. By using this POVM, one can realize the probabilistic teleportation of an unknown two-particle state.
基金Supported by the Special Research Foundation for the Doctoral Programme of Higher Education of China under Grant No 20050285002, and the Natural Science Foundation of Jiangsu Province under Grant No Q1108404.
文摘A scheme for probabilistic controlled teleportation of a triplet W state from the sender Alice to the distant receiver Bob is proposed. In this scheme, an m-qubit GHZ state serves as the control parameter. The m control qubits are shared by m（s1, s2… sm） spatially-separated supervisors. With the aid of local operations and individual measurements, including Bell-state measurement, Von Neumann measurement, and mutual classical communication, etc., Bob can faithfully reconstruct the original state by performing relevant unitary transformations. However, even if one participant does not cooperate during the process, the receiver Bob cannot fully recover the original state. This protocol can be extended to probabilistic controlled teleportation of an arbitrary N-qubit state and some other N-qubit entangled states.
基金Supported by theNational Natural Science Foundation of China under Grant No 10671054, and the Hebei Natural Science Foundation of China under Grant No A2005000140.
文摘We present an implementation of the positive operator valued measure （POVM）. By using this POVM, one can realize the probabilistic teleportation of an unknown two-particle state.
