Secret Sharing Of Quantum State And Cross-cener Quantum Identification

In this paper we study the new application of the W-class state,GHZ-class state,cluster states, we propose some secret sharing of quantum information state protocols. We demonstrate that these states can be used to realize the deterministic quantum state sharing of an arbitrary three-qubit state. For quantum state shaing of an arbitrary two-qubit state, our scheme is more economic and simpler than the previous protocol using the same quantum channel, i.e., five-qubit cluster state. These secret sharing of quantum information state schemes are deterministic, and the probability of successful are 100%.We study the cavity quantum electrodynamics (QED), and propose a secret sharing of quantum information of an arbitrary two-atom state protocol in cavity QED based on six-atom state. We demonstrate that six-atom state can be used to realize the deterministic quantum state sharing of an arbitrary two-qubit state in cavity QED. Such a scheme is simple and easy to be fulfilled in the experiment.Using the quantum teleportation and quantum entanglement swapping, a quantum identification scheme of Cross-center based on the W-class state is proposed, and the identification for user in distributed network is realized. The scheme includes register phase and authentication phase, and the whole system consists of main server and client server. All the operations of any user are processed at client server and there is no direct communication between user and main server. All authentications are processed by servers based on the principles of quantum mechanics, and its security is guaranteed by quantum mechanism. Finally, we analysed the security of the quamtum identification scheme.