Study On Teleporation Of Any N-qubit Unknown Atomic State Within Cavity-field And Atom System

The combination of quantum physics and information science yields a new interdiscipline,namely,quantum informatics.Quantum informatics mainly includes preparation of quantum state and manipulate,quantum teleportation,quantum communication,light-quanta communication,quantum coding and quantum dense coding,quantum cryptography,quantum encryption and decryption,quantum display and quantum recognition,quantum measurement and quantum non-demolition measurement,quantum algorithms and quantum computation,and the development of photon computer and so on.Quantum teleportation is one of the research directions which is developed most strikingly in the fields of quantum informatics.It is of the significant application value in the field of quantum communication and light-quanta communication to realize the teleportation of unknown quantum state,especially the teleportation of many-qubit unknown quantum states.In this thesis,the complete quantum theory is utilized to study the problem of quantum teleportation of N-qubit unknown atomic state in detail and systematically,and the mainly results are as follows:1.The new schemes for teleporting N-qubit unknown atomic state are proposed that is based upon the Raman interaction of single-mode coherent state cavity-field with degenerate V-type,A-type andΞ-type three-level atom,respectively.2.The new schemes for teleporting N-qubit unknown atomic state are suggested which are based on the Raman interaction of the contrary state of single-mode coherent state cavity-field with degenerate V-type,A-type andΞ-type three-level atom, respectively.3.The new schemes for teleporting N-qubit unknown atomic state are presented which are based on the Raman interaction of single-mode odd coherent state cavity-field with degenerate V-type,A-type andΞ-type three-level atom,respectively.4.The new schemes for teleporting N-qubit unknown atomic state are suggested that is based on the Raman interaction of single-mode even coherent state cavity-field with degenerate V-type,A-type andΞ-type three-level atom,respectively.5.The new schemes for teleporting N-qubit unknown atomic state are proposed which are based upon the Raman interaction of the superposition state cavity-field superposed by single-mode coherent state and its contrary state with degenerate V-type,A-type andΞ-type three-level atom,respectively.The results mentioned above are of the important guidance theoretically for realizing the quantum teleportation of N-qubit unknown atomic state experimentally.