Control The Probability Of Teleportation Quantum Circuits And Groups Of Quantum Zero-knowledge Proof

Quantum information is a new subject that is a combination of quantum mechanics, information science and computer science. Quantum information will inaugurate a new way for the developme- nt of information science. In addition, it is helpful for the research on basic problems of quantum mechanics itself.Among various kinds of quantum states, the quantum-entangled state is the most important one in quantum information science. Entanglement is also the main reason that yields the essential difference between quantum information and classic information.Being one of the directions of quantum communication, quantum teleportation makes great progress. In recent years, it has obtained important breakthrough in both theories and experiments. In this text we introduced a few familiar quantum techniques, such as quantum superdense coding, quantum teleportation, quantum swap- ping, quantum cryptology, quantum secret sharing, quantum secure direct communication, quantum identity authentication, quantum zero knowledge protocol and so on.Further, we present simplification scheme for probabilistic and controlled teleportation of the unknown one-particle quantum state using the pure three-particle entangled state as the quantum chan- nel. Both special entangled state and non-maximum entangled state are used as quantum channels in the scheme. In addition, we also construct two efficient quantum logic networks for implementing the new scheme by means of the primitive operations.Zero knowledge protocol is a basic method of cryptography. Its advantage is to keep others from pretending to be at the time of proving oneself, also to assure an useful information not to reveal. According to the basic thought of classical zero knowledge protoc- ol, we present a scheme for quantum zero knowledge protocol in group using a mode of quantum secure communication.