Asymmetric Bidirectional Hierarchical Controlled Quantum Information Transmission

This scheme proposes for the first time a hierarchical quantum information transmission scheme for asymmetric bidirectional transmission of unknown single particle quantum states and two particle quantum states with four communication participants. During the communication process, the communication party undertaking ordinary tasks can only complete information transmission under the supervision of one controller, while the communication party performing important tasks can only complete information transmission with the permission and assistance of two controllers. The scheme also discusses the selection of participants who communicate with Alice while the quantum channel remains unchanged.