Design Of Quantum Teleportation Protocol Based On GHZ-type State

Quantum communication,a new way of communication,is a new interdisciplinary subject which combines quantum physics and classical informatics.Compared with classical communication,quantum communication has the advantages of strong transmission capacity,large capacity,high transmission efficiency and unconditional security and so on,which attracts a large number of scholars to study quantum communication.This paper mainly focuses on the quantum teleportation in the field of quantum communication,and designs the bidirectional controlled and asymmetric cyclic quantum teleportation protocols with the tensor product of GHZ-type state as the quantum channel.The main contents are as follows:1.A bidirectional controlled teleportation protocol based on GHZ-type state is proposed to realize multiparticle GHZ-type state.In the protocol,first of all,both sides of communication carry out controlled non gate and projection measurement operation for their own particles,and publish the measurement results.Then,the controller makes a projection measurement of its own particles and publishes the measurement results.Finally,both sides of communication can realize bidirectional controlled quantum teleportation by performing corresponding unitary transformation on their particles according to the measured results.Meanwhile,the efficiency and security of the protocol are analyzed to prove that the protocol is safe and efficient.2.Combining the ideas of asymmetric quantum teleportation and cyclic quantum teleportation,two protocols for realizing the asymmetric quantum teleportation of arbitrarily single particle,Bell state and GHZ state are designed by using the tensor product of GHZ type as the quantum channel.In protocol 1,three participants can realize asymmetric cyclic quantum teleportation only need through simple projective measurement and unitary transformation.Protocol 2 adds a trusted controller David to better guarantee the security of the protocol.Finally,the advantages of the protocol are analyzed and summarized.