| Since Bennett et al.proposed quantum teleportation,quantum state preparation,and quantum dense coding,a large number of scholars have begun quantum communication research,both theoretically and experimentally.Compared with classical communication technologies,due to the effects of heat-consumption and frequency domain resources,there is a great technical bottleneck in classical communication.For quantum communication,due to the various characteristics of quantum states,it has high efficiency and high security,so that quantum communication can overcome the limitations of classic communications.In the field of quantum communication,the Bell state is an important quantum resource,some basic quantum information exchange schemes such as quantum teleportation,quantum state preparation and quantum dense coding all can be successfully implemented by the Bell state.Then,if the tensor product of two Bell states is used as a channel,the two Bell states can be used to perform bidirectional quantum information parallel communication.The scheme proposed in this paper is the bidirectional control of the mixed quantum information parallel communication scheme.In this scheme,both sides of the information exchange can simultaneously conduct quantum information exchanges and communication methods are different.For example,one side carries out the quantum teleportation and the other side implements the quantum state preparation,which breaks through the bidirectional symmetrical quantum information exchange method in the past.From the above analysis,we can be found if there is a plurality of relatively independent Bell channels in a multi-particle quantum state,parallel communication of multiple quantum information can also be performed.In the next of this paper,we introduced the preparation of a tripartite quantum state based on a seven-bit quantum state,and the communication of tripartite mixed quantum information,which further broadened the communication methods of parallel quantum information exchange.Finally,we consider it’s difficult to generate the largest entangled state,we propose a scheme of bidirectional quantum teleportation via a four-particle non-maximally entangled state.In this scheme,even if the channel parameters are not known to both parties of communication,deterministic quantum information transmission can still be implemented.In this process,all the modulation of the system is completed by a third party,reducing the operation of the communication party,and the success rate of bidirectional quantum information exchange is 100%. |
